power-ups mechanics
add owner
remove wrongly hardcoded values
add 'player.use_skill' to 'use_input()'
rename shooting methods
change default skill button to up_arrow
add a 'tank'character class
add a 'berserker' character class
removed 'state' attribute
remove controlling character throug the 'state' attribute
rename shoot method
rename shoot method
rename shoot method
fix spawn position
add 'movement_vector' attribute
removed clock and fps attribute
now includes the game mainloop
removes redundant attributes and methods, ralated to game modes
remove irrelevant variables i had forgotten
add player 2 controls