What is this?

Okay. First right off the bat, recently, I got a bug that whenever I beat a puzzle, I cant do anything. Next are the online puzzles, Im starting from 1 till 30 and 1 never stops. Lastly, there are super hard puzzles with LOW SCORES. Im gonna rate 2/5 just because it was made far ago when iPad 1 came out.

Portal2kid about Trainyard, v1.66