Update 1.2.9

Bug Fixes:

After dying, the restart button no longer resets all upgrades and powerups.

The super shield powerup is now fully functional.

The shield level displayed in the GUI now accurately reflects shield capacity.

Powerups not lasting full duration if a new one was picked up while one of the same type was already active is now resolved.

Fixes to cost display in shop.

Fixes to objects registering collisions.