Walkthrough :
NETHERWORLDS
Use your fireball spell extensively. The more you use each spell, the more experience you gain in that spell and the more rapidly youll achieve higher spell levels. The Fire Storm (Fireball level 3) is one of the most powerful offensive spells in the game and is superb when combined with other offensive spells.
Once youve completed all the objectives, stick around. Dont fly immediately to the exit point. Kill creatures, gain mana, and gain experience in your spells. You may find a hidden exit, leading to a hidden realm, which may reward you with experience scrolls or even a new spell (Use the Netherworlds map to provide you with clues as to the location of the hidden realms).
For economic recharging of your mana, fly fast toward your castle (assuming you have one, of course. If you dont, build one now, you pathetic excuse for a video games player) and hit the Backspace key when over the centre of your castle. Press F3 to change the game speed to Fast, and wait until you are recharged. Press F3 again to toggle back to Normal speed, and continue on your way, (Master Wizard).
Use the Barrel Roll (a distinctly underrated feature). Use this move (hitting the left and right cursor keys simultaneously) to prevent all kinds of creatures getting a target lock on you.
The MetaMorph spell renders you one of them. That is, if you, say, come across a huge swarm of bees, use your BeeMorph (MetaMorph level 1) spell to mingle with them they wont attack you. Very useful indeed.
If you DO decide to concentrate on Fireball experience, as mentioned earlier, use your Castle Fire Tower as much as possible. Not a lot of people know this, but every fireball the Fire Tower chucks out (successful hits only) will contribute to your Fireball experience, therefore leading you toward the Storm of blazing Fire.
Use Speedup as much as you can, because EVERY time you use this spell you will gain valuable experience, until you eventually become faster than light (almost!) with SuperSpeed Plus. (Speedup level 3). It is not necessary to speedup in any particular way or under any particular circumstances, to gain experience, so if you have cleared a level: Charge up with mana at your castle, and speedup up repeatedly around your castle until your mana has run down. Return to the centre of your castle and charge up again (use [Backspace] to stop, and [F3] to change game speed.
Repeat this flying in circles like a nutter technique to gain Speedup experience quickly and economically. It will be worth it when you can fly at seventeen trillion miles per hour around the landscape, laughing at the slow, inept enemy wizards. You may have realised by now that gaining experience in the important spells is essential to progress in Magic Carpet 2.
Concentrate on using your Rebound spell against Sentinels. Its the best method of killing them, and will help you gain experience in this spell, until you have one of the most powerful spell levels in the game: Amplify (Rebound level 3). Once you have this, Sentinels will drop like flies at your command.
The best tip of all: Get really good at the game and win. Dont die.
New Monsters
If you've played Magic Carpet you will recognise and will be able to deal with some of the old favourites; bees archers etc. Here is a guide to some of the new monsters.

MONSTERS

Cymmerian:

Life 7500/80 Mana 3750 X 3 Damage 300/castle damage 60
One of the most aggressive monsters in the game. Persistent and annoying, but not extremely dangerous unless encountered early on in large numbers. Far more vexing that the cymmerians proper, however, are the three little castle-eating bugs the creatures turn into when it's "killed". The bugs seem to have a second or two of invulnerability after they're created, to let them disperse rather than just being wiped out by an extra Meteor after you killed their "parent".

Devil:

Life 1000 Mana 4500 Damage 500 Although only really dangerous in very large groups in very close quarters, devils are extremely aggressive, and on any
world that has them you'll have to periodically clear them out of your way and off your castle. They are surprisingly good at hitting you from ambush. Small and agile, the preferred weapon against devils is Meteor or another area-effect spell.

Firefly:

Life 600 Mana 300 Damage 300
Like bees, only nocturnal and less aggressive
- fireflies neverattack first. Once they are riled, they do have a much longer-range attack than bees, but they're more sluggish and easier to hit and evade.

Goat:

Life 600 Mana 300 Damage none
Mana-on-the-hoof. Goat exist for only one reason: to be harvested for their mana. They're completely harmless.

Hydra:

Life 920 to 1840 Mana 20,000 Damage 850
While the good-old wyvern may still be the single most efficiently destructive monster in the game, the hydra is, hands down, no contest, the toughest to kill.
The life score given above is per head, of which there are seven, and they regenerate fast. To kill a hydra, you have to get all seven heads reduced to 0 at the same time. Once you have a hydra in
range, it's merely a matter of keeping the pressure on until it's dead. A good offensive strategy against a hydra is to put Meteor on one button, Lightening Storm the on other, both at the highest possible level. Then hit it with a continuos rotation of two Meteors, one Lightening Storm (pausing as needed to rebuild your castle, of course).

Leviathan:

Life 8000 Mana 4000 Damage 2000
Leviathans are the only exclusively aquatic monster in Magic Carpet 2. They spend most of their time submerged, with only a tiny hump showing on the surface. Every so often, especially when
they're angry, they'll raise themselves out of the water to strike at whatever
happens to be handy (usually you). They're only really vulnerable in those couple of
seconds they're partially out of the water. The only reliable way to hunt levathans is to use yourself as bait. Follow the hump around at a low attitude, harassing the creature with offensive spells (which won't do much damage while the thing is submerged, but which will annoy it). When it rears to attack, blast it with the most devastating thing you have - Meteors is preferred.

Mana Worms:

Life N/A Mana ????+ Damage N/A
Mana worms are completely immune to all of your attacks, so don't waste your time. They can, however, be possessed, which will cause the creature to undulate to your castle and be absorbed by the central tower. If you don't have a castle, you can't Possess a worm, and if your castle is destroyed, you loose all the unabsorbed worms you currently have possessed.

Manticore:

Life 10000 Mana 5000 Damage 350
Manticores are tough, mean, fast and travel in packs. Their green stun-rays are more of an annoyance than a menace, but they can leave you vulnerable to the monsters' leaping attacks, which can be devastating, particularly when multiple monsters are involved. The important thing s to remember when fighting manticores are keep firing and try to run ahead of the pack - don't let yourself get surrounded. It also helps to fly high and attack from long range, to make it harder for a manticore to hit you with a leap.

Moon Dweller:

Life 10000 Mana 100(initial) Damage 500 (auto)
Moon dwellers spend most of their time floating in the upper stratosphere, far beyond the ceiling of your carpet. They show up on the all- seeing eye, but if it's not too high the moon dweller won't be
visible to the naked eye or within range of any spells. They only descend to eat mana, and every mana ball they eat adds to their mana total. A moon dweller has one of the most devastating offensive attacks in the game - a high-power barrage of lightening bolts that will rip right through most defences (an Invulnerability spell is preferred, provide your energy levels are high). Your best bet is to hit first and to hit hard, and with luck take it out before it gets a shot.

Sentinel:

Life 36000 Mana 18000 Damage 500 (auto)
These floating stone heads are tough, but they have a glass jaw in the form of the Rebound spell. The best attack against a sentinel is it's own attack thrown right back at it. A Rebound spell backed up by a reasonable level of personal mana makes sentinels almost embarrassingly easy to take out.

Spider:

Life 5500 Mana 2250 Danger 100
Spiders are surprisingly hard to kill, due to their speed and their excellent camouflage abilities. They try to pull you down to the ground with webs, then sink their fangs into you. The worse thing about spiders is the tenancy to attack from your blind spot right under the carpet. You'll have to do some fancy maneuvering or use the Speed-up spell to lure
the stalking spider onto your line of fire. They also like to attack from dark, rocky areas where they're most impossible to see. An area-effect spell like Meteor is extremely handy against a camouflaged spider.

Troglodyte:

Life 16000 Mana 8000 Damage 1500
Big, tough and nasty, but slow. The biggest danger while attacking a troglodyte is that another trog will blind side you while you're distracted. Their attacks are severe, if they do manage to hit you. Staying high is a good way to avoid these creatures.

Vissuluth:

Life 30000 Mana N/A Danger Lightening,
Fireball 800 (auto) 1 Meteor 4500 In the final encounter of the game you go up against Vissuluth himself. It's not particularly tricky - just a long, tough fight. Vissuluth is stationary during your battle, so your tactics are simple. Go in with your best defence spell up (Invulnerability is recommended), your best offensive spell ready, and your personal mana levels high. Blast away until your Mana or life gets dangerously low, then run or teleport back to your castle. As soon as you recharge, do it again.

Zombie:

Life 4400 Mana 2200 Damage (auto):14
These strange and frustrating creatures do not physically damage, but their eldritch moaning can drain away all your personal mana reserves and leave you completely defenceless in a very short time.
They also have the ability to strip your spells from you, leaving them behind as a spell- jar you have to go back and reclaim them later. There's no particular trick to fighting them - just try to come in fast and blast them before can drain you.