Free Game Monday! How about checking out satryn, a completely free infinite twin-stick shooter and it's absolutely awesome once you get a few levels in.
The developer doesn't really give it much of an introduction on their store page so allow me: satryn is crazy. Much like other classic small-arena shooters it starts off slow, gradually introducing you to more varied enemy types. Some wander around, some fire at you, some constantly spawn new enemies and so on - it gets seriously action packed and becomes completely over the top eventually. You also need to try and collect little blue friends floating around too, and they increase your score multiplier.
With 8 enemy types, 6 power-ups, 3 environmental hazards and easy controls - there's a lot to love about satryn. It's a real challenge too, as you end up getting completely swarmed by enemies.
Made with the free and open source Godot Engine.
You can find it on itch.io. While free, the developer accepts donations.