Thanks for trying it out and for the comments.
A few notes:
It's not possible to jump over a gap. The whole point is to figure out the patterns of the holes moving up and down and try to not be in a position that you have nowhere to go. But even when that happens, you must decide quickly where and when to fall and if it's the best strategy. Needless to say, this is not your typical platform game:)
It takes a little while to understand that you jump only when the gap is directly above you, it's true, but this is the whole point. I also added some pictures about that in the How to Play section.
If you liked the enemy on level 2, keep going, there is a new one on each level:)
Enjoy and thanks again!