Fix float > int on scrolling layers 

* Prevents problems with layers scrolling at different speeds due to wacky rounding
Bugfix: squirrel can only drop when ~full speed

* Fixes an issue on game reset when the squirrel would change lanes as a result of the reset
Scale up the squirrel
Fewer goodie drops, without any scaling
Add more health - 10 instead of 5
Much improved squirrel drop, sans beam