Thank you for playing and taking the time to give a feedback! It means a lot to me.
Restarting the level and going back to previous level are some interesting idea, I will definitely consider adding them! Sorry about the color, I didn't think of that while I was making the tiles. I will do some research about the color and try to fix it, maybe using pattern instead of color would be better.
Thank you once again, and I also look forward to play more games made by you in the future,