It's an interesting concept, doing tasks as fast as possible while trying to avoid the deadly cart for as long as possible, but the execution is where it falls apart.

The graphics hurt my eyes a lot because they're very, very bright blues and greens with little saturation and very similar lightness values to each other, so it's hard to see the text for tasks or score without squinting. I'd recommend looking into color theory and how to make color palettes.

It's also pretty repetitive and outside of getting the "go left/right" tasks you're just gonna be walking in circles mashing the same button five times. The cart dropping ink is a nice concept to help keep it interesting but it gets very hard without any way for the ink to clean up, especially with a large hitbox like the player has.

It's definitely an alright game, though, just needs a lot more work and polish to make it interesting and visually appealing.

Colors like black and grey still count as colors, the total amount has to be 4. So you could've done one blue, one green,  black and white