Main changes
Added framerate control to game Settings
Added character selection to Level Select Menu
Bosses now produce points when hit
Reduced clamping on boss damage
Ion blast now also removes bullets in small radius
Bosses now have correct points bonus
Weapons are now not lost on death, only downgraded to 0
Weapon switch now does not reduce weapon level to 0, but downgrades it 1 level down
Picking the same weapon acts as weapon upgrade
Implemented level secret system
Additional ship control inputs:
RB to swap gun direction
Keyboard arrows to move the ship