The game looks really good. At first is hard to know what's going on, but I caught on quickly (after dying haha) where I was shooting.
Some things in mind would be adding a way to know when a block has finished spawning or can be collided with. I know the orange blocks get destroyed, but it's hard to tell if they're active or not at first, I didn't know whether I could cross through them or not a couple times.
It's actually really fun!