Needs some sounds.
And it is always nice to see people trying their own art, but I think it could be improved a little, it has a mspaint feel to it. I guess making it more pixelated/square would solve that.
It would be interesting to see some limits to the use of the commands, maybe make it all free at first, but once you start over you get to complete the levels using 1 less block then before, or something like that