You can now buy upgrades.

Save space money earned through your games to buy ship upgrades.

Upgrades available now: 

1. +100% beam power ($3000)
2. Missiles: double the blast radius ($5000)

Planned upgrades:

1. Time warp: time slows down
2. Nuke
3. Hull armor plating 
4. Pickups efficiency
5. +% space money pickup efficiency (you get +6 space money per  coin instead of the normal +5)

Let me know if you have other upgrade suggestions!