Please check this one too!

https://store.steampowered.com/app/2620000/BULLETHELL
Steam Early Access is pretty magical. Players do not know what they will get. Developers do not know how the finished version will be... and this coop can create astonishing results.
As a few of you may know (due to Steam notification issues), I am developing BULLETHELL to be a sub-30 second arcade minigame challenge with no fillers to get that heart pump feel as soon as possible. It is pretty experimental; it is not an UBERMOSH (but it shares the same universe). It is not a room beater like QUICKERFLAK, but a "kinda new" thing, handcrafted by me for you.
Yesterday I sent the HEAVY GEAR update, and I am working on the next one.
Many thanks for the support, reviews, and community hub interaction! Your feedback is priceless! It helps to shape an experimental design, and it is very heartwarming!