Definitely one of the better games I've played in this jam and on this theme in general. The idea is not revolutionary (I'm sure there are others like this) but the combination of well though out level design and the cute art and dialogue leads to a very satisfactory playthrough. I beat it in 23 resets, no idea if that's great or terrible. I liked that the final level was easy, after the penultimate level being so challenging.
I really have no complaints. I have seen other games where you control two characters with two sets of inputs, but putting them together on a single input leads to so much more interesting design and is easier to wrestle with for your hands.
If you plan on expanding the game which you should, then I would like to see a bigger variety of interactable mechanics like you have the flowers and pressure plates. Objects that move you around (think a cannon, portal, or bouncy object), enemies that shoot bullets that travel each time you move, a switch that switches your positions in the levels, etc.
Actually I do have on small criticism - I would have preferred if the mechanics were not explained to me in dialogue and I had to experiment with and figure out the mechanics myself, but that may be up to personal taste.