Below you will find the download pages for Threema for all platforms.
The official game is not natively a "browser" game, but you can make it portable:
Some sites use in-browser emulators to run PC-based demos or flash versions of similar games. Tips for Playing Jump King in a Browser
Playing in a browser means you don't need to install large files or configure complex settings on your machine.
Are you playing on a network with (like a school or corporate office)?
The following appendix provides a list of technical details about the game:
However, the "portable" aspect also means you need to be aware of technical nuances. Browser games rely heavily on hardware acceleration. To ensure your jumps are pixel-perfect, you should disable heavy background tabs and ensure your browser is up to date. Input lag is the enemy of any Jump King player; even a millisecond of delay in releasing the spacebar can result in a catastrophic tumble back to Redcomet Village.
The Ultimate Guide to Playing in Your Browser: Portable Precision
No .exe or .dmg files to download, bypassing system security blocks.
Download a portable web browser (such as Google Chrome Portable or Mozilla Firefox Portable) from PortableApps.com directly onto your USB drive.
