So the jam ended and the game was pretty good, but there were still a few things I wanted to add. So here's the rough list, more or less in the order they were implemented in:

• Quit button on title screen
• Default ship sprite instead of a blank canvas
• FILL TOOL in ship customiser
• Improved visual communication on how adding weapons and thrusters works
• Improved HUD
• More sprites to shoot at
• Balancing
• Players can no longer have a blank canvas as their "ship"
• "Are you sure" popup for certain irreversible actions
• Proper round structure with a countdown and Game Over system
• Play area expanded to be "endless", but with subtle hints to get back to where the action is
• Starry background rather than ugly grey squares
• SHIP PRESETS to populate earlier rounds with "dummy" players
• A Pause button!
• MANY bug fixes and minor polishes
• Downloadable version for Windows available in addition to browser version!

Thank you for playing!