Well, what can I say...
I've never been able to criticize your games in any meaningful way, so, let me just say I enjoy this experience very much. The scale was rather small for a platformer, but that's to be expected, as it is your first venture into the genre. And the gameplay elements that you have developed are very strong and make for a challenging but honorable game.
Also, not that I'm the first person to say this, but it would be nice to see some other kinds of areas rather than the well-worn archtypes that have been in the last few games.