Bug fixes, bug fixes. Some changes.

I had to reset the hotkeys for this patch, sorry for the inconvenience! Some users got stuck without a usable set of hotkeys and no way to reset them. Hence the reset. The keybinding menu has been changed to ensure this doesn't happen again.

-Fixed bug where the timer counted up from a negative number after death in endless modes -Fixed achievements, if you completed all 4 normal levels or all 4 endless levels you should get their respective achievements if you boot up the game now. -Added notification that endless modes are unlocked after completing a world