Ui now scales along with blockSize.
Added support for upgrading guns.
Clicking on an already selected gun switches to the upgrades view.
The game stats now scale.
Fixed UiPlayerInput from getting stuck.
The menu is not needed for android so it was removed.
Added border around ui controls.
Fixed bug where round number was not drawn.
Fixed bugs in MortarTower and HealthTower.
Some distances within the MortarProjectile class were using pixels as units instead of block size.
The initial regeneration rate for the HealthTower was set to an incorrectly low value.