Dev build 4 has just been pushed and contains the last three days' worth of work:

• Joypads should work again
• There're now some simple menus, and you can transition in and out of the game. 
• New enemy types
• Some work on the initial level
• Powerups! There're now guns and ship buffs! In both game modes
• Eugatron has some little rules added for how things are spawned...
• Cursor is hidden by default
• New audio
• Some random bug fixes

It should be live now, for CHIM CHUMS.