A musical toy! That is great!
I had quite some fun with it. Kudos for allowing to switch between minor and major, and for letting play with a full keyboard (instead of only notes from the scale). There's even a sheet on music theory! Actually, I would have like to also have somewhere the tone and chords of the music, just to improvise more easily on it. But finding it by ear was also fun, so… That works too I guess.
It's simple, but I like it. A great entry!