I had a lot of fun with this! Played it with a friend over the course of a couple months and we always had a good time with it. That being said, the game is quite buggy, especially in multiplayer. I couldn't tell you the number of issues we came across during our time with the game. They were all manageable, and not gamebreaking or anything, but they were certainly annoying ghfghjkjhg. If you're playing alone you probably won't have nearly as many issues as we did, so I'm assuming multiplayer just needs to be tinkered with.
The core gameplay is very fun, and never gets too easy, especially when you factor in the entropy levels, which you'll constantly be bumping up every time you beat a run. BUT, unfortunately later levels can get extremely busy, with projectiles flying all over the screen. The level you fight Elanor in is especially brutal, being in closed rooms with shit flying fucking everywhere. I almost always just b-line it straight for the end there, as it's too much all at once.
One huge positive I'll award the game is the means of reaching the true ending. It's something you work towards over the course of your whole playtime, trying to figure out what you need to do in order to progress further along this chain is very fun, with a lot of the methods being pretty cryptic to puzzle out, with some very cool solutions. It helps that this game's story is actually quite engaging. Even though I played it with a friend and we didn't really stop to read lore, I would go back on my own time just to read through everything we collected. It only gets more interesting the further you get to reaching the true ending as well, with me quickly growing an appreciation for characters I initially didn't think I'd care all that much about.