I almost always enjoy a nice wave-based hack 'n' slash game, and this was no exception. After I got the controls right (I figured out that I had to use the T key rather than G to select the second item), gameplay was smooth and sufficiently challenging.
It's a bit unfortunate that most of my play sessions led to a crash with a segmentation fault on my Linux machine. This is probably a bug in the Godot engine, but with all the crashes I could not get to the ending, if there is one. Can't look further into this without the source code either. (Note that participation on GitHub Game Off requires you to upload the code to the repository as well!)