To be more like Muse Dash

[Cryptises]

• Notes don't miss for hitting too early (sliders too)
• Hearts aren't actually something you need to physically hit (only collide)
• Each note that damages the player takes 20 hp respectively, spikes take 30
• Map speed can vary overtime (dependent on song)
• +Ghosts, don't necessarily need to hit them but does add to combo 0 penalty for not hitting (unless they're directly next to a note)

[swoolcock]

The goal is not to be too close to Muse Dash. While I'd like for some of these to be implemented, they won't be called nor function the same way.

Regarding your individual points:

Notes don't miss for hitting too early (sliders too)

In line with other osu! rulesets, I'd prefer that for the most part, hit windows be hit windows.

Hearts aren't actually something you need to physically hit (only collide)

This is already the case.

Each note that damages the player takes 20 hp respectively, spikes take 30

This is configurable, and will change in the future once the HP bar is better fleshed out. It's currently awkward to implement due to osu! mostly only supporting a 0-1 range of health.

Map speed can vary overtime (dependent on song)

This needs to be done carefully, as some maps use dumb BPM and SV for the sake of fancy effects or artificial difficulty increase, and it doesn't translate well to an endless runner.

+Ghosts, don't necessarily need to hit them but does add to combo 0 penalty for not hitting (unless they're directly next to a note)

This will be a thing, but probably unlikely to look like ghosts, unless people skin it that way.

[frenzibyte]

Does this still need to be open? maybe can be moved to #1 or track each actual issue separately.

[swoolcock]

I think it’s probably trivial enough to close.