I tried out a random crap today too.
Space Elite Force
https://store.steampowered.com/app/855850/Space_Elite_Force/
It's a very short shmup. A single playthrough of the campaign takes about 20 minutes.
I don't like the controls. Keyboard arrow keys and z/x for primary/secondary fire. I'd prefer WASD and mouse 1/2 to shoot, no way to customize keyboard controls . Not sure if it's a bug but you can't shoot primary and secondary at the same time.
It uses persistent upgrades with enemies dropping upgrade points and a shop between levels. Has three different types of primary/secondary weapons. I only tried the main path for both. Homing missiles is a bit easy mode once you can get them. After I got them I didn't use primary weapon except on bosses, where their increased size made primary guns a little more efficient (multiple shots can hit and do more damage than the slower firing but higher damage missile).
There are temporary upgrades that drop when you destroy "upgrade ships". 2x score, upgrade point magnet, a lightning bolt (I think it just makes primary guns a bit more powerful), and shields. The shield is mostly useless. It makes 3 options circle you and they absorb 3 hits... but THEY have a hitbox. So they die when you wouldn't have taken damage anyways.
No speed upgrades. The ship felt a little slow for me.
I only played standard mode, but it was very easy. There's very basic bull-hell style patterns towards the end game. I haven't tried hardcore or infinity mode yet.
Cheesemints are very cheesy. They're almost all "beat this level" and "get this upgrade". Only three exceptions are "complete hardcore", "get 1,000,000 score in infinity", and "complete a mission with no damage".
I wouldn't suggest buying it, but it's not bad if you get it in a bundle, but not a whole lot of replay-ability. I'll play it enough to get all the cheesos, but it'll probably wind up being < 2 hours.