I'm not familiar with the site but I would not trust it, because of the reasons below.
Sites that are violating the terms of bustabit's open source license and should
not be considered trustworthy:
* moon-3d.io
Source
https://www.bustabit.com/license.txt Mind to say something about this? The original crash game license warns people already, sorry to say but no one should risk their money on any sites which are listed on above link.