man, patch notes says lag is fixed, but I cant progress beyond 4 minutes. Its running at, no exaggeration, about 3 frames per second. The timer runs as slow as the enemies, so I'm wondering if this is different lag than the other comments below.
Oh wow, even when the game lagged it didn't lag that bad! Let me look into it...
If you want to restart the game, it won't load your game again, but there is a cheat you can unlock by pressing:
u d l r a b s
on the menu screen (in the upgrades, the up arrow will give you 10k coins each time you press it)