I'm making a simple "move-the-boxes-to-the-right-spots" game (I think it's called Soukoban in Japanese). I'm using a simple tutorial by Minor78 as an example of how to make it so I can save my levels as small BMP pictures and then load them as a level in the game.
I'm stuck at a certain point. I have some sprites where I need to change their color. My problem is that if I, in my game, select the same option as in the tutorial I can only select a color and define the RGB values. I can't seem to get it to let me use an expression like in the tutorial.
I've included a screenshot of my game on my left screen, and the tutorial on the right.