Looks like everyone's self promotion, so better do the same! You can find it here: https://conradicals-games.itch.io/martes
It's about using your only unit of energy to discharge it into enemies, and then get it back so that you can re-use it to destroy other enemies!
Another good one is this one: https://harrk.itch.io/1pco-op
You play a 2 player game, but with only 1 character. Really original if you ask me!