V0.4 release!

Welcome, users! Version 0.4 is finally here and with that comes a list of new changes.

1) Changed T3 of the random Generation.

2) Added pause menu with ability to switch active map to/from test world and/or randomly generated world

3) Added floor and wall textures

4) Added recoil

5) Changed target sound

6) Removed projectile gravity

7) Made projectiles delete themselves after a while

Have fun and envoy!