This shmup is going to be caravan-style, bearing 2, 5, 10, and 15 minute modes. It'll involve medal collecting a la Ketsui, charge shots, and a rather unorthodox scoring system. The mechanics are almost polished, and once satisfactory, I'll start creating enemy graphics, formations, bullet patterns, and more sound effects. Music might be in the final product, but I'm still using the Lite version of Game Maker, so unfortunately the music will have to be packed with the executable.
Until I can get a suitable build out, here's some pictures of the development of this shmup:



Early development. This is where I was testing out basic functions like moving and firing, alongside an HUD test.



What I have so far in my test build. I'll need to fix the sprite priorities a bit here....