This was great! The main character's design is really well done, the way his solar panel functions visually as a hat is an inspired choice. The platforming feels good and I enjoyed the puzzles. Got stuck a couple times, definitely slapped my forehead on realizing the trick to the last one with the gears!
I really enjoyed the lizard's dialogue as well - you guys clearly had a lot of fun coming up with all different kinds of lines, because he had new things to say at so many different idle moments and missed jumps!
Seeing other robots along the way was a great move too - and the final shot was a cool story idea! Didn't see it coming, and makes me want to learn more about the universe we're inside of
Also, the ending credits sequence was an awesome touch! Perfectly timed out to the music, and a great additional mechanic to introduce at the end to get you across the long distance without simply transporting the character.
Great work! Would love to see more from this world - I feel like there are a lot of things you can do with the solar idea if you chose to do more with this universe!