Awesome game ! I played it all the way through, and i really love the cartooney art style, the mech design with matching pods is so good, and for a solo made thing, these city maps are also really cool, and as a fellow Godot dev, i found the "professor godot" character pretty funny :p
2 small issues if i had to nitpick :
1) didn't really affect the game but was visible since you let the console in the build, and that's all the errors @D.Galga mentioned below
2) sometimes it was a bit hard to judge where you could walk or not, i've had some steps where i didnt seem to be able to climb up and manage to do so upon insisting, and i guess that was the intended path since i found some capsules up there, and the same goes with finding ways to go back down, though i gotta point that this issue was in part mitigated with the ability to pickup and drop freely at anytime the capsules, so i was able to drop some off the edge and then find my way down eventually.
Oh and i know this is probably cause of time constraints but too bad the game lacked any sound, it would have been cool to complement the high level polish of the visuals ^^
Ok now despite these, solid game and it was fun, plus you made a well explained tutorial about every aspect and i like how levels got gradually bigger to ease you in
Good job :)