I really liked the controls, I found the blocks without collisions to be a little annoying, it would be cool if there was a very subtle difference in their sprites to know you would fall through them, but subtle enough that you would still do it.
I think it has good enough movement to need a speedrun timer for levels. It feels like it falls into that category.
In the tutorial the spikes are really hard to see against the background. In another level I fell into a spike pit and didn't get hurt, but wasn't sure if it was intentional.
Overall I think it is a really fun game with a lot of potential :)