Its good however some glitches

Its good, I enjoy it to pass the time and to see if I can figure out the difficult puzzles. But sometimes when I solve a level it will give you the option to go to the next unsolved puzzle and the buttons just stopped working. I have to exit the game and wait a few hours even days before it works again. Please fix or tell me how to

Elevenjalapenos about Trainyard Express, v1.66