+ Cool idea that's on-theme!
+Appears to function as intended!
+ Controls really well!
I liked this a lot! You did a really good job making it feel "asteroid-y" without it's central mechanic, and I appreciate the thought that went into making smaller obstacles to account for the fact that you couldn't blow through them. Perhaps my only real gripe is that I wish your ship exploded into pieces when struck, like in the old game, but I can 100% see how that could be a time thing.