Post-Jam update 1

I've spent some time polishing the game post-jam, just so that I can get it looking nicer. Planning at least one more update after this.

Updates:

• Added a web version
• Added some explosion effects for when the boss ship is destroyed
• Added an effect for when the player ship is destroyed
• Added some shading to the water to make it look less static
• Added a shader to give the game a retro-CRT screen effect

Planned Updates:

• New background image
• Some more story text
• General fixes

Known issues:

• Web version will briefly freeze at certain points
• Some minor text issues in the web version
• There's been one or two instances where the upgrade screen isn't cleared properly.