changes:

-iron martian octupus now has 15 health instead of 10 and spawns from 20 level instead of 25, also it now deals 3 damage instead of one

-implement exiting to menu on the M key while the game is paused

-start adding multiplayer, yet not working at all

-killing an iron martian octupus will now give you an additional heart

-implement screen capturing on F2 key

-implement system of messages