The idea of fixing up a gundam before it's deployed sounds way fun. It's like those cleaning/fix it up games but with a much cooler subject haha. i agree with the other commenter that the spark effect is really nice, I found myself just drawing all over the gundam just because it was so satisfying.
It's so tempting to work on visuals before game mechanics because they're so pretty! A trap I've fallen into many times. Still really cool to see the visuals you came up with the short amount of time you had!