Free Advice - You get what you paid for 
Ok that disclamer out of the way. KivyPi on my Pi 3 not using a touch screen pretty much is a fail for me. The mouse cursor is missing until you click and move, it then shows up as a ring as if you touching a touch screen. In other words what is happeing in this setup is you mouse is emulationg a touchscreen and it sort of works in the best of circumstances. For me in les then 90 seconds of use it crashes with a menu location error.
I tried setting this up with the Defult Raspian Strech desktop and it failed to yeild a mouse cursor at all.
Both are slow and slugish over all where GC use is concerned. If you donāt want to us GC then there are some fiine peices of software that can run here.
I reported that under these circumstances I wouldnāt bother running on a Raspberry PI. It turns into a expensive choice for a less that satisfactory experience.
I posted some questions about anyones experience on Ubuntu. @Gero reported hew is using successfully using Ubuntu Mate desktop with GC. I truely appreciate that. The flavor of Ubutu for Pi is Ubuntu Mate on the Raspberry Pi dot Org page.
The quick answer is - Iām running GC on a Pi3 with Ubuntu Mate. Iām having a better than adverage experiance on the Pi3. That is Iām running GC in full screen with an arrow cursor and mouse control just like on windows. I have not plugged in the Maslow yet but I doubt I will run into any issues with the conectivity that cannot be worked out.
That is the good news. What is the bad? The bad isnāt so bad. Ubntu Mate is slow to load up, some things are more sluggish. Some of the installs semed to go ābusyā for over 40 miuntes. I think I have a 5 hour total working onthe install to get to the GC screen. The point is when GC is running itās very resonable in speed. The install is not clean it throws errors and some stuff just has to be figured out.
In the end barring a connection issue I can recomend this as a Raspberry Pi solution.
Let me expalin the hardware Iām using. I happen to have a Raspberry Pi laptop. I do not like to be nagative about products publicly under normal circumstances. Iām going to stay away form this here mostly. I have a laptop kit that is know for battery issues, so itās a laptop that is not portable and must remain plugged into the wall. It features a 720p display and and a nice keyborad with a PI3.
From my perspective running GC on lower resolution than 720p could be challanging.
Iām going to say it is probaly a waste of time to run anything below a Pi3. A $29 price point sounds good but with a power supply and memory card your closer to $60. If you have a 720p monitor or better and a keyboard and mouse laying around this might be an option for you. If you are starting form the ground up there are laptops that will be a much better bang for your buck.
GC on a PI3 with Ubuntu Mate is a reaonable solution in my book. Please let me know if you found this helpful.
Thank you
