It sounds pretty impressive, but the $200 price tag is a bit steep... It would take a lot of app purchases, banner taps, or microtransactions to pay that back!

I do want a solution for Ruby on Android – especially if Gosu is ported, too – but preferably one more in-keeping with the open nature of Ruby itself (and libraries like Gosu). That blog goes into surprising detail about how they pulled theirs off (including which open-source software they used – namely LLVM) so the feat should, in theory, be reproducible as FOSS. Of course, it would also be possible to offer it for a more reasonable price, perhaps using crowd-funding to get it off the ground.