Balancing is a little off, you get to the best unit too quickly and then you don't even see the enemies before they die, but it's a solid entry and a great start for a retro lane based tower defense game. Good job!

I enjoyed it, trying out different builds at first. It’s a decent tower defense game but there’s not much variety. Once magical knights are obtained (which is quite fast), there’s nothing left to do.

That was a short bit of fun, took me 3-4 attempts to get to 6 magical knights and I can't seem to die then. Still, I enjoyed.
Edit: Maybe upload a release build instead of debug build? Download is quite large