Eternal Universe

Clearing is easy for a 25 since the density is sparse and the required techniques are simple, but scoring is quite tricky.

It looks like a free 25 on the surface, but once you play it, you realize there are surprisingly few potions and it's packed with patterns that are incredibly easy to miss, so your stamina and gauge get eaten away without you noticing. It is on the easier side for a 25.

A chart I'll never play again after clearing it once. No matter how I look at it, it feels like they used this to test the waters before releasing Helio...

There are no gauge-filling sections, but it's difficult because it makes you miss in small increments. When you actually try it, it's strangely tough.

It's very easy on stamina. The beginning is easy to bracket/mash, and there are no difficult patterns before or after the hardest part, the big stairs, so clearing it isn't hard.