I've finally got around to updating this game.

• The major change is the control method. Rotation is now seperate from thrust, similar to the original Asteroids game. The ship velocity is also halved when colliding with scenery. Hopefully you will all find this a bit easier than the Jam Entry version! 
• Also added sound effects and music. You can turn these on/off with the F1 key.

A few bugs fixed:

• Any cosmonauts picked up when you explode are now reset back to their original positions. They are only saved when you go through a wormhole to switch stages.
• Final time and score should be correctly displayed if you finish the game.

And some tweaks:

• Asteroids now decrease in size when shot.
• The thruster VFX are now translated, not rotated (the original GB wouldn't have done rotational sprites) but I think that's just something that bothered me :)