I seemed to have acquired more money than the game can handle... I have $ - 1,303,000,000 and it is counting down. I guess that means it is time to restart the game.
I'm still working on a fix for that - I thought I had it all ready to go yesterday morning, but there were some unforeseeable issues that I'm still trying to work out.
I have found when I reset any of the money that has not yet reached the money counter gets added to me after the reset. This is making it so I am able to buy all the speed upgrades and additional swords immediately after reset.
I've gotten a couple other reports of level transition issues. I'll take a look at it when I can, thanks for bringing it to my attention!