Hi! Thank you so much for your feedback, I'm really happy to hear you liked the game :)
As for your issues, try downloading version 1.3 (as the walkthrough was made for this new version).
For chapter 2, there are two different answers you need to input (two tablets), make sure that you're inputting the correct answer for the correct tablet.
If that doesn't work, then email me at arkicade@gmail.com with screenshots describing the bugs you find in the game.