HI ... played it for some minutes (runs fine on Linux with wine - no need to boot something else here

).
The music ... while it is calm I think it does not fit to a "candy" theme, think a more "circus" or "carnival/fair" music style would suit more. Albeit it is of course always nice to listen to some Chris Huelsbeck music

The background: when I tried to concentrate on the game area I felt ab it drunken ... the game "moved" ... until I recognized it is a slight movement in the background. Also the background elements seem to have pixelated outlines (not "alpha/antialiased"), maybe it is the scaling of the image (played in windowed, not fullscreen).
I think a bit of animation in the background is ok -- eg grass slowly moving in the wind or so but... the "whole" background moving horizontally?
Yet I have to confirm I begun to ignore the background rather quick - but I am unsure how it "feels" if you play for a longer time.
Gameplay after only a quick test: first thought is "search for fat/big candies for chain reactions". Reminds a bit on a mix of "clickomania" (click away groups of tiles). Dunno why it needs different candies (except for a "varying look") - I first of all thought it is a kind of "match 3" + "spill over and affect neighbours" gameplay (when just judging a screenshot).
Menu: I was only able to click on the "icons", not on the "menu texts", maybe make them clickable too

Aside of the nitpicking first feedback -- nice entry, well well well done!
Edit: Playonloop has some chiptune music which imho fits nice ("mood wise") but might be a bit too energic
https://www.playonloop.com/2018-music-loops/follow-mehttps://www.playonloop.com/2018-music-loops/pet-parkhttps://www.playonloop.com/2020-music-loops/rainbow-puzzle... (click on their tags to see more of the entries).
I used playonloop for some previous compo games already (the free shortcut loops repeated some times and then crossfaded into another "loop set")
bye
Ron