The action tree is a really cool battle system! My favorite aspect of it was the bullet time when selecting stuff, that feeling when you just narrowly avoided a bullet for example, that felt great!
I think it worked in well with the overall gameplay loop here, with how you acquire more and more of an arsenal, which works against different enemies. Like the bow works really well against skulls with it's fast reload time and reach but not really against the blobs. Super cool idea!