Quite productive today - 2nd Update

So I added a main menu and a way to end the level after collecting all gem's. A key will appear and the door will open once key is collected. For now game restarts when entering door.

Enemies are there but they don't do harm.

Next up:

- Enemies harm

- get lives working

- switch level to next when entering door

- update highscore on main screen after Game Over