Okay pardon for my carelessness, I missed the option of using the VSync or not, went back to try without it, and the animation actually ran as smooth as it should be. Still a bit slow when the page turned to load the puzzle/mini-game part, although it sure was much faster than when I forgot to turn off the VSync.
Anyway, perhaps for future reference or something, I loaded it on the largest resolution (16000xIforgotthenumber :'(( ) and was using Windows 10 64-bit version (spesific OS build is 17134.1246).