I found the other levels easy but I did feel it was getting progressively harder, then level 8 hit me. Lol
I like the type of puzzle game. I think to continue it you need to think of some more mechanics to introduce each group of levels and work on balancing a learning curve. It definitely has potential if you can figure that out (along with improved graphics and a theme that matches you picking up the jumping powerup, maybe having further powerups also, like dash).