Just for some ideas, not sure what works best for you:
In the end it has to work for you and also be consistent with the art-style you prefer :)
I'm not sure what I like better, the fact that you gave pretty good advice or that you back after playing the 3 days ago and giving that advice.
I think the shadows 100% would be a lot more helpful as well as the color! I really wanted the Trial themes the same color to convey their themes, but after seeing your post I totally should of made those blocks that color. It really pops! Or at least have a shared dark purple between both trials. Would of saved me some time too!
Next time I'll definitely add a little more color variety not just for looks, but to help the player know what's what. Thank you for taking the time to make that great example!
