Nice concept you have there! Kudos for employing all three themes at the same time. I think the game has a really nice concept, pointing out especially the mechanics for shifting the middle beam around in position. And I personally find it a big plus that it caters for multiple local players, although I couldn’t try it out with anyone else as I live alone (so I just acted as both players at the same time - which makes the co-op mode a very interesting spin on the single-player mode).
In terms of potential improvements, I find that the font for the instructions is quite hard to read and gave me a very hard time until I managed to understand it. Also, it doesn’t seem to mention how Player 2 controls the dragon (although I later found out by trial and error). I also couldn’t find any way to get back into the main screen, which I found slightly annoying, along with the music which is nice initially but after a bit it becomes too much. Other than that, I just think there should be some form of scoring in the game (based on survival time?) and a better balancing overall, as the the random nature of the obstacles makes the game extremely difficult, making you die within a few seconds of starting (unless you control each dragon individually, but then you have other difficulties).
Overall I think the game has a lot of potential as a fun little game, with a bit more polish.