Groove Coaster is perhaps one of the most visually appealing games on the arcade Rhythm Game market. While not having the psychological horror of the Alien Invasion in the parent Space Invaders games, it has the potential for some great audiovisual scares.
- "Spring to mind"
. It's ambient cacaphony reminiscent of Yume Nikki, with a completely invisible track and a background that's just a dark gray gradient. - The aptly-titled "Marry me, Nightmare", a Haunted House-themed track with skull imagery, including a wireframe skull laughing at you at one point, and freaky Interface Screws and Jump Scares everywhere such as suddenly showing up on a track on the opposite side of the screen. On top of that, it has one of the hardest charts in the game. And the track constantly flips between different time signatures, giving off the musical equivalent of Uncanny Valley.Iiiiit's showtime! AH HA HA HA HA HA HA HA HA HA HA HA HAHAHAHAHAHAHAHA...!!
- The album jacket for "Got hive of Ra" (also used on the Everything Get Groove album), featuring a butterfly with holes in its wings, can induce feelings of trypophobia.
- The unintelligible "singing" in some of Shohei Tsuchiya's songs, particularly his slower ones like "Sleep" and "KANNANSHINKU" (you may also recognize it from Dariusburst ports) can sound pretty alien and eerie.
- Just what is happening in the lyrics to "It's a pit world"? Apparently, the narrator's heart has stopped, their brain has turned green either due to or resulting in "too much thinking", and they live in a garbage dump with foreign matter clogging their heart and brain.
- "Your Best Nightmare", as befitting of the boss fight it originated from, has a few examples:
- Clearing any difficulty below Extra/Master results in a Laughing Mad wall of text, much like in Undertale itself when you lose to Flowey.
- The SOUL attack segments each end with the player hitting a note over an ACT button, causing a dialogue box that reads "You called for help..." to appear, followed by the game fading back to the main body of the track without showing the SOUL providing healing like in the original game. While this can be chalked up to Compressed Adaptation and a need to keep the track around 2 minutes, it looks as if the SOULs can't or won't help this time around!
