I like the idea of powerups and all the different level types you can create with it, but a few things:
1. I wish there was a way to see how long a powerup will last.
2. I like the font, but it is sometimes too big and you don´t need to say what to do everytime, players can remember how to restart, and they can figure out stuff themselfs.
I hope the feedback helped you, would be nice if you could check out my submission too. :)