Patch 1.2

Patch 1.2

- added more sounds to the enemies

- red enemies shoot faster projectiles

- added a new enemy, it spawns after wave 5

- added a menu for changing volume. it can be accessed by pressing O, it is closed by pressing O too. If it doesn't close, try clicking on the menu then pressing O. This bug will be fixed on the next patch.

- added effects to the GUI when scoring or gaining an extra life

- added a wave counter to more clearly delimit waves

- general bugfixes

- red enemies now move more