This was NOT made by Dave, only some models were, check who is author next time. Can you tell me more about your issue?
Game was made by C&D Cardboard games , I did most of models (Crowie the crow) and some models were by Dave Microwave, the issue you have is that this game and the Dave's ones are made in Windows, to make chromebook version they would need an actual chromebook to build it on, sadly none of them have mac.