Cute Game ! Hard to balance but it works well :)
Little feeback:
When you do pixel art it's important to have a constant pixel size on the screen so your assets looks coherent with each other. On unity you can achieve that by using the pixel-perfect camera and keep all your sprites to a size of 1. For the ui sliders you should used sliced sprites so that the engine will scale it properly to your canvas size and keep the pixel ratio.
Also the numbers (text) in your ui looks blurry you should switch to using textmeshpro.
it's a good start ! Keep going at it :)