New version of my demo! Initially satisfied with my version 2, after testing it a bit more thoroughly, I noticed quite a few issues that I have fixed in this version 2.1:

-> Added an animation when you defeat a boss. Previously, there was just a screen without really understanding what happened; now, you can see the boss die. 
-> Fixed some collision bugs.

And most importantly, saving the best for last, I'm finally using the Rynex as the main ship for the first two levels. I mean, come on, my game is called Thunder Force Heaven, but it was missing some Thunder Force, right? That's now fixed!

I'm happy with this version of my demo, and I hope I’ll manage to complete the final 7 levels one day :)