The first 10 or 15 times I tried to play, I simply lost whenever I touched an enemy. It also took me a while to realize why I wasn't getting resources when I finally managed to kill the enemies. I still don't quite understand how the momentum works due to the inconsistency. Perhaps a tutorial would fix this problems. 

The game looks good, and the sounds fit the atmosphere well. 

A solid wee game.

A few bugs - Sometimes collisions seemed to stop you dead from full speed, and sometimes they seemed to not slow you down at all, with no particular rhyme or reason to it. The first spin I did I had no momentum, so just sat there for ages and didn't seemed to lose much spin speed - I sat there for about 2 minutes before refreshing. And at one point I appeared to have the required resources for an upgrade but couldn't buy the upgrade.

None of these were a hard block from enjoyment, but did seem a bit odd, so thought you should know. Good job <3