I love this! imo concept is the most important thing in flowjam and for that Market Gnomes can't be beat. Even though there's a lot of bugs, and a lot of bugs, I can't wait to see this get updated/fixed up post jam.
the art style is great as well, it makes it feel like an old newgrounds game. it's nice to see some non-pixel art games in the jam, I should try something different next time too.
adding on to what sup3r87 said, "and maybe for the stock market to be a popup rather than an entire other section of the game." I actually like the idea of having to look away from the tower defense bit to do the stock market, but I'd recommend doing something like the rulebook we had in low noon saloon that would have an arrow to elastic ease you to the stock market and back. I think that would make it more clear that time is still moving while you're in there and to act fast.
(And idk if this would work in the gameplay but it would be cool if I could buy the bug parts as well so I could say BUY BUY BUY SELL SELL SELL!!!!! )