From trying the android version, I see that there are some games that are not in the windows version. are they unlockable?

Some of the games will unlock as you play the current ones on Android. Which game in particular are you interested in?

Also, some of the games are still in development or had various performance issues on mobile processors so they are disabled.

I am actively working on adding more and more games to the collection all the time, and fixing issues that arise with the ones that are out there.

Is there a particular game you would enjoy seeing on Android sooner rather than later?

I personally loved Hyper Tank as a kid, dunno which game op had in mind. Great collection, btw!