good start, then bad
spoiler: around lv15, most of your abilities are taken away. you're forced to open the menu and choose "skills" to be available for that level. Note that "skills" here includes "walk left" and "walk right". SEPERATELY. not to mention the jump, double jump, levitation, etc.
you introduce a few nice mechanics, and just when it seems like it's going to be a nice little game, you take it all away and sell it back to us one piece at a time. the game just turns to shit after level 15, and the sheer frustratin of being able to go right, but not being able to go back to the left until i opened a menu and activated the skill!!! just pissed me off too much.
Terrible design, sorry.