I really enjoyed this game! Though I sorta cheated... When climbing walls if you press "w" then "a" or "s" quickly after you can climb up walls!
*Jumping doesn't work when you're in an inactive block then you activate it*
It would be cool if this game gave you a reward for completing levels without any damage. A good reward could be something like 1.5 x coins collected, or something of the like.
Though this is a big thing to fix, can you see if you can work on the blood effects. The blood on the ground looks good it's when blood is just shed, it's the blood in those neon red bubbles look bad-ish. Also when the legs are cut off. That's all I have against the game, rest is good.
Thanks! It's just plain old actionscript 3 with a library called 8bitboy to play the music