My dear friend,
DonTaco games barely run on the most powerful setups available and heat up the processor to the gills. Even if you somehow managed to get this weird engine working on your phone, you risk losing your arm.
It most assuredly is not, the dev is very active in his discord and just released an update for his other game, Big Long Complex. Small Complex "soon".
While I do not know what happened here exactly, I can offer the advice that I have seen quite a few comments where weird issues with the game were being caused by extracting it using Windows' built in archive utility instead of a 3rd party one.
I recommend you uninstall/delete the game folder you downloaded and then go get a third-party archive utility like 7zip (free). Use 7zip to extract the downloaded file to a folder instead of the default option that uses Windows file explorer archive utility to do it. This might help, or might not.