That was awesome fun, thank you :)
At first I thought it was just about catching the red dot, so the surprise of getting shot at was brilliant.
I found myself swearing at these little red boxes in my determination to get them without taking damage, which I reckon is a sign of a very engrossing game. Loved it!
I’m interested in how crazy-hard (but more rewarding?) it would be if you died when hitting walls, rather than just stopping on them.