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)

When I type Ghost A / Ghost B, etc. it means Ghost B will come shortly after Ghost A. If they're the same they come in at once.

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.

[Level 3]

Wave 1 Ghost 0.0s: ↓→Λ Ghost 0.0s: V→Λ Strategy: ↓V→Λ

Wave 2 Ghost 0.0s: →Λ→V→Λ→V Ghost 0.0s: ↓Λ↓V↓Λ↓V Strategy: →↓Λ→↓V→↓Λ→↓V (A tip for this is to look at the top ghost and draw →↓ when you see →)

Wave 3 Ghost 0.0s: ↓V↓→ Ghost 0.0s: →VΛ→ Ghost 0.0s: ↓→↓Λ Strategy: ↓→V↓Λ→ (You have to memorize this :( )

Wave 4 Ghost 0.0s: ΛΛ→ Ghost 0.0s: VV→ Ghost 1.0s: ֍ Ghost 3.0s: → Ghost 6.0s; ↓Λ↓→ Ghost 6.0s; V↓V→ Ghost 9.0s: → Strategy: Take care of the first → ghost, then when 6s ghosts appear, draw V↓ΛV↓֍ then →

Wave 5 Ghost 0.0s: V→ Ghost 0.0s: V→ Ghost 0.0s: → Ghost 0.0s: ↓Λ→ Ghost 0.0s: V↓Λ→ Ghost 0.0s: Λ→ Ghost 0.0s: ↓→ Ghost 0.0s: VΛ→ Ghost 0.0s: V↓→ Ghost 0.0s: Λ→ Ghost 0.0s: ↓→ Ghost 2.0s: ֍ Strategy: Just do V↓Λ→ then ֍ and they'll be gone.

Wave 6: Ghost 0.0s: → Ghost 0.2s: ↓ Ghost 0.4s: Λ Ghost 0.6s: V Ghost 0.8s: → Ghost 1.0s: ↓ Ghost 1.2s: Λ Ghost 1.4s: V Ghost 1.4s: ֍ Ghost 1.6s: → Ghost 2.0s: → Ghost 2.4s: ↓ Ghost 2.4s: Λ Ghost 2.6s: V Ghost 2.8s: ֍ Ghost 3.0s: ↓ Ghost 3.2s: Λ Ghost 3.4s: V Ghost 3.6s: → Strategy: When the first ֍ appears, draw it, then wait until all the ghosts have spawned until you do the second ֍. Make sure to not draw the first ֍ too late otherwise it will destroy the second ֍. Just watch my video if you don't understand.

Boss Stage 1: →ΛV Stage 2: V↓→ Stage 3: →ΛV Stage 4: →↓V Stage 5: ↓Λ↓

Notes: • The time between the boss appearing and the first pattern is 2.0s • It takes 2.3 seconds for the boss to go to its next pattern. • The time it takes to draw the final symbol to first ghosts appearing in Stage 4 is 18.0s