Wow, high praise for half a game! ;) Thank you very much!

Ha, yeah, it does need a tutorial. Unfortunately, like the sound, it's something I just didn't end up getting to.

Regarding the graphics, since it looks like I haven't mentioned it in the comments for this submission, the sprites are from Henry Software.

The idea was that it'd be a strategy consideration where you'd choose between units that could potentially counter what your opponent had played, with the fact that you couldn't explicitly pick actions being a major part of gameplay. Unfortunately, it didn't get that far, so the intent doesn't really come through.

Yeah, without some explanation up front, I can definitely see it being confusing. It also didn't end up rendering quite the way I expected, so it's even less clear what's going on in the WebGL build than in the Godot editor.

The cards do have different atk, def, and HP values, but yeah, there's too much randomness and not really any meaningful strategy. It pretty much just got to the point of "you can technically do the important stuff" without any nuance or interesting mechanics.