polish editor:
- properly translate ids to chars to init test level
- preview of levels
- undo/redo stacks with snapshot before/after each action

menu with key control
menu for gamepad
warp mouse for absolute position to keep inside playing field
random set: build set from 10 random levels with randomly generated extras

new extras
- free paddle y movement
- move level down 1
- instant death
- instant warp
- smaller/bigger balls (?)
- laser (clears entire row, limited number of shots)
- net: bring back one lost ball

