@Spike Personally, I also wouldn't mind a jump pad to get from the smaller RL / large building area to the SG/YA room, but you can use either GH, RL + BS or Flight to access the room without taking any self-damage, at that there's also a possibility to rocket overjump the border to save some time by avoiding going through the large building. A jump pad from Invisibility to the topmost zone with the RL woud be cool too, IMO.

I was originally planning to record a couple of shorter videos on SONICBOIL for later, but I did it now, as there's an occasion and an intensive discussion about the map :) Linking it here for those interested:

• 3 ways to get the BFG on SONICBOIL by ZaRR: youtu.be/BS7nzYEJze4
• Parkour on SONICBOIL by ZaRR: youtu.be/j5yWhQXS-qU

Edit: [grammar correction :P]
Edited 1.94 days after the original posting.

Edit: Yeah my original comment didn't sound all to positive in retrospect XD
Edited 1.27 minutes after the original posting.

For me this was one of the first custom releases (as for those that I downloaded directly from ..::LvL), too. I played it for the first time back in 2017, and it automatically became one of my favorite maps despite its partly intentionally quirky nature. Sure, the amount of lava on this level can feel too excessive (maybe this exact fact was not intentional), but there's the Grappling Hook, Flight power-up and various platforms (including moving ones) that allow for some fast and fun movement, flying, ferry crossing and even parkour :)

I'm currently at the end of writing a review for SPIKECTF1. I'll be more than happy to write one for SONICBOIL too, once I'm finished with the review for SPIKECTF1 and have enough time.

Please feel welcome to send in an alternative review or include a comment.