Oh wow, your recolored version is actually an improvement!

Well, I didn't know that it's usual to submit art with alpha channel, but thank you I'll do so in future. The tiles were designed for a game where black is treat as transparent color.

Btw, have a look at Pyxel Edit. It's incredible easy to create tilesets with it!

Good to see that you could do something with it, and thank you for telling your opinion. :)