New SINISTROID Build!

Hello!

So I've been working on Millikan's Reach a lot, but recently I decided to explore a few more of my ideas regarding Sinistroid. To that end, I reworked the original Sinistroid page to be explicitly about the Game Jam version, and the  more modern Post-Jam version will be its own project.

I've added:

• Background planets
• An improved main menu
• A new playable ship type
• Some small UI and particle improvements

It's not too much, but I figure it's a nice thing to have and I'll be updating the game more in the future. It's a nice side project to have when I want to work on something a bit smaller in scope than Millikan's Reach.