Never run JavaScript code in your browser that you do not trust. Malicious Eaglercraft clients can steal browser cookies or session tokens. Always download from official developer links.
Modify the game’s internal tick speed. A Timer of 1.2 makes you move 20% faster than everyone else. The exclusive version includes a "Strafe Speed" that works specifically with Eaglercrypt’s movement physics.
: While the standard 1.12.2 version is limited to a world height starting at Y=0, Tuff Client supports building and exploring in the "deep dark" layers (below Y=0) on compatible servers.