Just finished the game. The color palette reminds me of Dizzy games, specifically the ZX Spectrum variants because they also had a black background. Although this game has a much more pleasing to the eye color palette. The visuals work well together and the game concept is simple and fun, without being too long to be monotonous. It took me a while to figure out what to do with the chicken.
Not too sold on the hard pixel style. You mentioned scrolling issues, things like plants animations (I liked that they are animated) look also bit weird, the hard pixels make it cut too quickly, as if there was a tearing issue with the display almost. Also, I didn't really like the black outlines on the characters, especially with the worm and the bee, felt strange, probably because the background is also black.
Also, I had some issues with the controls. When trying to press the down arrow key in framed mode, the browser window kept scrolling down. I had to switch to fullscreen mode to finish the fish/bee parts.