just a little thing i noticed-- i don't really like the fire ability, so I skipped it and stayed with poison for that level. When I picked up Ice, the ability i had equipped was the fire/chaos magic..
just a little help for anyone who wants it, you dont need to buy the chain thing (the item that makes it go forward without holding down) one way that i found that works well is if you hold down on forward key and switch windows and come back it will (as long as you dont do anything besides click on the game) keep you going forward