I would advise to test it if possible before buying it. True, the game offers a lot in terms of combo. You can also parry by pressing forward. I don't really like the style, but I can't say it's bad per say (remind of some Game Boy games, but in color). The music is... I can't remember a single track, other than the title theme, but I can't say it's bad. And there's also a good replay value because there are a lot of endings (although I find the story to be in opposition with the style - might be a personnal thing, I like my BTU more light hearted).
So it's perfect, right? Not really, the problem with this game is that it's quite difficult, or at least too much for my taste. It's not rare to have like 5 or 6 enemies at the same time on the screen, so it can get a litte bit crowded.
When I look at the Steam achievements, I can see that only 19,6% of the people who bought the game was able to finish it on normal (I'm not part of this group), which is quite low. For example, Bloodstained: Ritual of the night sits at 43,3%, and Cuphead is at 13,6%. So, if you like a challenge, well go for it. But if like me, you prefer your BTU to be more "gentle", you should consider another game, like River City Girls for example. Because, even on normal, it's challenging. Not extremely difficult mind you, but challenging nonetheless.
And there's also something to know about the gameplay. It's true that there's a lot of combos, but some of them are rather hard to pull out. I won't say that they are as tough as a combo in a fighting game, but almost. Let's say that they can require a good dose of dexterity.
My personnal experience with this game: after playing it with a friend, I decided to buy it. Then, I reached a zone with a raft. I lost maybe 5 or 6 times here, then decided to refund it. Fast forward to 2019, now the game is 3,99€ on Steam. I say to myself, why not? Even if I don't finish it, I know what to expect. So yes, I bought it again. Right now, I'm trying to finish it but... How should I put it? I don't find it really fun. I played River City Girls 23 hours straight, but FnR I can't. I try a stage, lose 3 continues, then stop. Oh, I almost forgot: you have to unlock the easy mode and the training mode.