First of all, many thanks for your great work!
The ODROID version of rvgl runs just fine on my Raspberry Pi 2 since the vc4 drivers are available. Almost all stock tracks run at full speed.
Only problem I have is with some custom tracks that have high resolution textures. These tracks run well when I manually resize the textures. With full sized textures however, the game crashes as the Pi runs out of memory, or the game just runs really slow.
It would be great, if there was an option to set the maximum mipmap/texture size (in addition to the already existent 'generate mipmaps' option).