Bug fixes, optimization, and 1 tap drop for Mobile

Bug fixes, optimization, and quality of life

1. When 3 items of the same sort would collide at the same time, some funny stuff could happen, and an attempt to be tested has been made.
2. The build is now better optimized to work on slower machines and mobiles. (still can be a lot when there's a lot of collisions)
3. For mobile, now it's possible to enter your name.
4. For mobile as well, everything can be done with 1 finger, a long touch to move, and one short touch to drop. 
5. The feedback when 2 rockets would collide that wasn't there in the previous build anymore has been fixed. (you can see stars again ^^ )