A cute one-button platformer that's very demanding on the precision with which you press that one button, to the extent that actually completing any level after the first few is often absurdly tedious. The levels that don't need perfect timing are pretty satisfying. I guess if I was into pixel-perfect platformers then I might be more interested in this, but that's not me.
My progress: reached the level with the cannons and long conveyor belts (I dunno which number)