There are six symbols in the game: → (Red symbol)
↓ (Blue symbol)
Λ (Green symbol)
V (Yellow symbol) ֍(Lightning - clears one symbol off each ghost on screen and used at the end of the final boss sequence) Note I can't find a Unicode character for lightning but you know what it looks like. ♥ (Heart - restores one heart)

Every level has a set of waves. The next wave appears when all the ghosts in the current wave are dead. However, some waves have timings so ghosts at a certain time - there's no way to speed this up. (a quite clear example of this is in Stage 2 before the boss) Therefore, you should focus on the last ghost(s) of a wave to get a good time. As general advice, you should just spam the symbol that comes next (you can look at this guide) and then read the rest.

The first ghost(s) in a wave is named Ghost 0.0s. If ghost(s) comes at a set time after these first ghost(s), it will be named after their respective times (e.g. Ghost 0.5s, Ghost 1.0s). These times are rounded to the nearest 1/10s due to awkward 30FPS recording. After you clear a wave, it takes 1.7±1.0s for the ghost(s) of the next wave to appear, whose level depends on certain stages, being hit by the last ghost, and if there is an upcoming boss.

I also recommend you play the game several times before reading this - that way you don't have to look at the reference every step of the way.

[Level 4]

Wave 1 Ghost 0.0s: ΛΛVVΛΛ Ghost 1.0s: → Ghost 2.5s: ↓ Ghost 4.0s; → Strategy: Beware the fast ghosts.

Wave 2 Ghost 0.0s: →V→Λ→V→Λ Ghost 1.0s: ↓ Ghost 3.0s: ↓ Ghost 5.0s; ↓ Ghost 7.0s: ↓ Strategy: Mash ↓ at the end.

Wave 3 Ghost 0.0s: VVVV Ghost 0.0s: ↓↓↓↓ Ghost 0.0s: ΛΛΛΛ Ghost 1.0s: → Ghost 3.0s: → Ghost 5.0s; → Ghost 7.0s: → Ghost 9.0s: → Strategy: Continue mashing ↓. Mash → at the end.

Wave 4 Ghost 0.0s: →→VΛ→→VΛ→→ Ghost 1.0s: ↓ Ghost 3.0s: ↓ Ghost 5.0s; →→↓↓→Λ→↓↓ Ghost 6.0s: V Ghost 8.0s: V Ghost 10.0s: V→V→V→ Ghost 11.0s: Λ Ghost 13.0s: Λ Ghost 15.0s: Λ Ghost 17.0s: Λ Strategy: Like in Stage 2, don't rush because all of these ghosts are on set timers. Just kill Ghost 17s as fast as possible to set off the next wave (which is difficult because mashing Λ is hard)

Wave 5 Ghost 0.0s: ↓ Ghost 0.0s: → Ghost 0.0s: Λ Ghost 0.0s; V Ghost 0.0s: V→ Ghost 0.0s: Λ↓ Ghost 0.0s: VΛ Ghost 0.0s: ΛV Strategy: All ghosts appear at the same time, but top ghost is the fastest and bottom ghost is the slowest. Try VΛ↓→VΛ but be quick since top ghost is fast.

Wave 6: Ghost 0.0s: → Ghost 0.0s: ↓ Ghost 0.0s: → Ghost 0.0s: ↓ Ghost 0.0s: → Ghost 0.0s: V↓→V Ghost 0.0s: Λ→→Λ Ghost 0.0s: V→→V Ghost 0.0s: Λ→↓Λ Ghost 0.0s: Λ→↓Λ Strategy: First 5 ghosts are fastest. →↓ then VΛ↓→→↓VΛ

Boss Stage 1: ΛΛVVΛΛVV Stage 2: ↓↓→↓↓→V→ Stage 3: →→Λ→↓→→V And randomly generated ghosts - one comes 1.0s after the boss then one/two ghosts every 3.0s Strategy: Focus on the boss, ignore the other ghosts, since the level ends when the ¤boss¤ is dead! Take a few hits, if you can.

Notes: • This stage has a theme of a really slow, complicated ghosts accompanied with fast, simple ghosts. You should really focus on the complicated ones, so that does mean tanking a few lives. Hopefully that won't be a problem. • It takes 0.6s for the Level 4 boss to transition from one stage for the next. • The time it takes to draw the final symbol to the cutscene is 14.0s. • The cutscene to stage 5 is 9.0s long.