Really cool mechanics in this puzzle/platformer !
The elements and environement interactions are really good and i like the possibilities they offer, even if there's a handy tutorial explaining the basics, i really enjoyed the fact that as soon as i tried switching by myself after trying the fire/put out fire with the water mech, and saw a plant mech i instinctively tried to water the seed and bam plant grows to create a platform :D Thats a sign of well thougt out mechanics.
While not detracting from the quality of the game, it unfortunately has some issues. Character movement felt a bit too fast and made it hard to jump precisely, and the jump physics them selves feel a bit odd (not sure how to describe it) also got stuck on the first level after the tutorial cause i wasn't sure how to get a crate on a button to hold the door open.
Now with that said, still the game has lots of qualities and charm, especially visually with these mech designs, gotta love the water mech with it's little snorkle/exaust thing XD
Good job to you all :)