Liberty is a traditional BASIC with a GUI twist. We are just on the cusp of going cross platform. So commercial games are not really what we have been about. But unless you try you will never know. Start with Liberty BASIC V4.5.1 Leave v5 for now till it is better developed.
There is more: midi playing, wav files for sound effects. Backgrounds , animated sprites. Play with the mouse, keyboard events or a joypad. Liberty Basic can create an stand-alone application when you register your copy. For playing around and coding you can download it and use it without a registration key, but you will see a popup after a testing period. LB is going cross-platform: win, linux , mac and raspberry Pi. LB is the bigger brother of JB.