This is really cute, gave me those comfy vibes from back playing the Motherlode flash game way back when.
The main menu and credits music is rad (also adorable titles for the roles on the credits)
I ended up skipping a the last 3 or so levels of the mech upgrades without meaning to by refuelling.
I tried doing a second playthrough and the first text box had the text all jumbled up with the order of the letters, not entirely sure what might have been causing it, but hopefully it doesn't happen on anyone's first try :<
Enjoyed this one, good job!