Cuphead

Cuphead is a bit of a throwback - in both game and style.

The controls are reminiscent of early coin-op side scrollers, and the delivery is staged as a cartoon from the 1950's.  The combination is fantastic, the levels are super-SUPER hard, but the replayability of a level is almost immediate, so there is a bit of a groove that you can get into.

This game is Betty Boop on the surface, but Dark Souls in the "difficulty to stay alive".  Fun!  I ended up grabbing it a couple days before Elden Ring was scheduled to come out as something to fill a tiny gap.