Fun game to play and nice one to look at, The path being on a circle is really interesting compared to the usual always go right games.
Upgrade system is nice but maybe have a pause in reading player input when it pops up because if someone were to mash the attack button they would just choose something at random. Not that I would button mash...
Got to 1000m at around level 17 but didn't seem to be able to trigger an ending - I'm assuming its not in the game?