this is quite good but has some problems ... some of the jumps (especially level 3 ) are too pixel perfect , and coupled with a bit of a dodgy edge jumping mechanism it makes it very frustrating to have to keep repeating steps .
also the powerups are pretty useless since they only last a few seconds so arnt worth bothering with really...
it could do with at least 1 checkpoint per level as death means back to the start which is annoying .