That's quite a clever use of the theme !
And i really like that the "refill stations" are simply just flowers because bee :p plus the insect theme really made me think of the old games bio hazard battle and kolibri.
Did great on those sprites and the low poly BG the overall presentation feels quite polished for a solo effort !
If i had to nitpick i'd say my only issue would be that it can be a bit hard to wait for a flower and trying to refill under the bullets barrage during the boss fight but if that's if i'm being really picky
Great job otherwise :)