I LOVE THIS GAME! But here are a few criticisms.

1. I think the graphics can look more better if you hired a professional pixel artist (If it's in your budget) or tried to improve on the shading and making the characters more detailed.

2. I LOOOVE horde mode but I wish you can customize it so that it can be either a time limit or kill as many enemies before you die or if it's endless and you can respawn.

3. The character voices are a bit annoying sometimes.

4. Please add music! I would love for this game to have an awesome soundtrack!

5. Make the levels look like they are in a specific setting for example if the game takes place in space which I'm not sure it is then make the levels look like it's in space if you want  it to be in space

6. The macos version doesn't work properly so please fix it if you can! And maybe consider making the game moddable

Seriously GREAT job on this game!