GoodSmile

GoodSmile is a very talented Geometry Dash player, possibly among the top 20 best players in the game. He has beaten a wide variety of insane and extreme demons, and hopes to complete all the top 10 hardest demons in the game. Goodsmile (aka, GS) is working on beating a buffed update of "A Bizarre Phantasm" legitimately and currently has 78%.

Demons Beat
Goodsmile has to resort to recording with a camera because his PC lags while playing a level and using a recorder unfortunately; he hopes to get a new PC by next September. As of date he has completed many extreme/insane demons:

Audio Excursion (coin update): https://www.youtube.com/watch?v=u7iRwQtjW3E

Landect by Ozpectro 100%: https://www.youtube.com/watch?v=u9dZIDVlDl8

Ruined Journey by Erael 100%: https://www.youtube.com/watch?v=MU8Qp1PhKTE

Galatic Fragility by Teamsmokeweed 100%: https://www.youtube.com/watch?v=HLho_kzGBcM

Transonic by Woogi1411 100%: https://www.youtube.com/watch?v=rp8NVwfvyu4

Creeper Force by CreeperMLK 100%: https://www.youtube.com/watch?v=f2fgUP_IAMU

Necropolis by Neptune 100%: https://www.youtube.com/watch?v=x1ZBfBmbx1w

Ultraviolet published by Viprin 100%: https://www.youtube.com/watch?v=bMsCEmiEfRA

Unrecorded Records (Goodsmile got these offcam): 

Cataclysm 100%, he has this video for proof: https://www.youtube.com/watch?v=rg4qhMnP35Q As well as 50% recorded on his channel.

Supersonic 100%, the first insane demon Goodsmile has beat.

Ultrasonic 100%, also beat early on and he believes that it is easier than Supersonic.

Bloodbath 45%, he only got here due to a lucky attempt while he was practicing; he will record when he gets 40% or above again. Currently A Bizarre Phantasm is his priority.

Ultimate Fails
Goodsmile has a rough track record of dying at the very end of extreme demons (95%+). He has created a series known as Ultimate Fails where he showcases these flops; you might notice that all his ultimate fail videos are in the pets and animals category and this is used to symbolize the savage nature of these fails. (Also be warned, some of these contain cursing in Russian).

Ice Carbon Diablo X 96%: https://www.youtube.com/watch?v=gH9uetPGBOI

Ruined Journey 98%: https://www.youtube.com/watch?v=9uLpkkFMACw

Creeper Force 96%: https://www.youtube.com/watch?v=xQ5azOTHal0

Other Fails

Ultraviolet 85% (due to bugs): https://www.youtube.com/watch?v=9QeOhJvFPZA

A Bizarre Phantasm 78%: https://www.youtube.com/watch?v=p3QDkD6sBbg

Trivia

 * Do not confuse GS with the clan GeoStorm that are also known as GS.
 * Due to hack accusations, Goodsmile has to record while a watch actively ticks on the screen.
 * Goodsmile has crashed several times on 66-71% of A Bizarre Phantasm.
 * A 45-second video on his channel of angry birds has amassed over 250k views.
 * GS started playing on the last day of 1.5, because of this he believed that Geometry Dash received weekly updates at first.