The entire map is a huge tower in Minecraft Bedrock Edition. Spiral Tower, as you already understood by its name, has a spiral parkour path in the MCBE that you need to overcome. By the way, the whole map consists in MCPE of standard blocks and textures.
To reach the very top in Minecraft for Android, you have to try. There is more than one path to the top, and some blocks may be trapped, so be careful. What to do when you reach the top in the Spiral Tower? We don’t know. Maybe jump in MCPE down?