Glass Bottom Games is doing a limited time free demo of SkateBIRD so if you want to play around with it here are the links for it.
I talked about SkateBIRD on TWinL70 so if you want to check out that episode to learn more, here is the link for that.
I tweeted about this on the ThisWeekinLinux account too: https://twitter.com/ThisWeekinLinux/status/1205384607190933504