Hey there, @shadree. I just wanted to let you know I just released a new game update (v144) which contains a lot of bug fixes and improvements related to what you previously reported here.
Again, thank you very much for your help!
The local co-op experience should be way better thanks to these changes so please make sure to update to the latest version next time you play.
If you want to keep your save game file, you can do so by copyingthe "savegame.json" file at the root of the game folder "/BabyDinoAdventures/" and pasting it also at the root of the update game folder.
If you play on Steam, this should be automatic with Steam Cloud.
Have fun!