I liked the megaman aspect of choosing the order and gaining a power, although seems contrived story wise.
Although choosing the wrong level to start with is a pain, having to peg a squirrel 8 times is painful... and man those bats.... F* em.
Anyway, I enjoyed it , even though the end boss battle is a big let down ...
Suggestions:
1) make the magic powers a bit more visible at least, if not more exciting to see. Hard to see the little rocks.
2) maybe just assign some keys to the powers instead of having to switch ? ...