Rabbit & Steel is a perfect example that sometimes, less is more. The game has very simple visuals and straightforward gameplay with no filler; you are immediately thrown into the action after forming a party, with small moments of respite between fights. It has extremely catchy music, carrying its atmosphere and making each stage very memorable. You will easily enter a flow state while playing this game - it reminds me a bit of Osu in that regard.
This game was made out of genuine necessity, as there is nothing quite like it out there. The developer took the most fun parts of MMO raiding and deleted the rest; keeping only the essence and making it so that you don't have to go through hundreds of hours of tedium just to access the fun parts of the game.
To make the game easy to jump into, it was also made into a roguelike - meaning everyone starts even when a new run begins. There is still progression in the form of unlocking new rabbits to play as, cosmetic trinkets, as well as unlocking loot that simply gets added to the pool of random loot you may get during a run, but the main draw of the game is that it's fun to play out of the gate and always will be.
One thing that should be noted is that the game is balanced with 4 players in mind. It's still doable if one person drops out mid-game, but if you try to start a co-op run as a team of only 2 rabbits, you'll likely find that the game is too hard. There is a "Cute" difficulty option, but that one is so easy it's more of a training mode. This is important to note, because if you intend to play this game only as a 2-player game, you'll find that there isn't really a difficulty to play on that will be fun for you. Thankfully, lobbies fill out very quickly, and you won't encounter any elitism when playing on Normal, so don't be afraid to play in a full lobby. People are just doing their best and having fun.