The concept is pretty cool, I think I've played this before but it's had an update for this Jam.
The riding mechanic is cool, however it seems to take a lot of explanation at the start. It might be worth trying to simplifying the controls if you can. Perhaps have it either two handed or one handed, but not the option of both, it's quite a lot to take in at the start.
I had fun playing it, but I did experience a bit of motion sickness with it, especially at one point where I fell down into the sea off a cliff!
Overall a nice concept and well presented, great job. Good to see there's a voice tutorial, that helped a lot!
(One minor thing, I did notice the apk is almost 700Mb! Not sure what is taking up the space, but it looks like the resources could do with some optimisation)