RAM != disk. RAM = memory for a program to use while it runs. Disk = the 8 GB where you put your music.
Google results say that if an app uses too much RAM, it will be terminated. Most of them are ~2 years old, and tend to agree that the maximum is between 20 and 40 MB. Newer iphones might have higher limits, but consider this: Blockland idling on the main menu right now is using ~250 MB of RAM. If I joined a server, that would expand drastically. If it wasn't already over the limit, it would exceed it and suddenly Blockland would quit.
Unless you happen to know a godlike programmer who can rewrite the TGE from scratch and make it fit in 10 MB of RAM, then you won't have enough RAM left to store brick data, and everything will break.