I bought this on my Steam Deck a couple hours ago, and I’m having fun with it so far, even in spite of the fact that I’m pretty terrible at these kinds of games. The choice of difficulty level helps a lot in that regard, making things bearable without making things too easy.
The grappling hook lets you throw enemies’ projectiles back at them, and you can chuck the bodies of defeated enemies at new enemies, which is a (new to me) mechanic I’ve been having lots of fun with. There are 8 stages/bosses a la Megaman, and I’m two stages deep so far. Pretty fun. :)