The floaty-ness of the jumping got a little on my nerves, but my personal preference with games about destroying things in a timelimit is a certain amount of skill-based speed. Basically, I started chomping at the bit waiting for the mech to fall where I aimed it. I did discover you can just walk into blocks, but there again the walking was too slow for me and I couldn't find a way to "run" or otherwise speed up.
I believe I would've enjoyed the game if it was just a bit faster and/or had a few more movement options. I liked the electronic soundtrack, the sounds you had are solid (I didn't even get sounds in mine), and the assets all look good. I especially liked the tall towers in level 1, and was a little disappointed I couldn't find a way to smash them.