It's a cube. And the reason why in the shop and when you click something you don't have it says "Icon" Is because it's a skin, and a skin is technically an icon.
I just beat the level with this as the xo song... I first heard this 4 years ago when my hardest was windy landscape or something, now 4 years later I somehow have the skill to beat this level, it took a while but it finally happened, thank you for being the initial motivation for me to pick the level up in the first place, I've always loved this cover and it's very nostalgic of mid-2.1 pandemic times <3
In Theory of everything 2 at the starting if you click the second yellow orb a little bit late you can actually reach till the next blue orb. I tried it , you should aso try.it's a bit hard