Really great graphics! I especially like the subtle parallax, it really feels like the perspective on the background is changing. The falling leaves are a nice touch as well.
Neat concept, and it's on theme but different from most! I would love to see other level designs, especially asymmetric ones, but given the jam constraints that'd be hard at this level of graphics. More levels, with less damage to lose and win, would give it a lot more gameplay time and less repetitiveness; I ended up just rocking left-to-right and shooting at the same place, gradually wearing the enemy down, total time played 3 minutes.
Overall, the prettiest game I've played in the jam so far, and one of the more novel ones.