Hey JemyDev,
Thanks for the appreciation and glad you liked the game.
I am a complete noob when it comes to art and tried my best. However I completely agree to your points about the staircase. I myself got confused sometimes and hence added the popups which kinda looked off place now that I look at it.
Totally agree about the book thing, completely missed the audio cue/ or a cutscene to show that player got the time travel ability.
Thanks a lot for your valuable feedback and suggestions.