Tips:
1. Click the run button, DON'T press any key on the terminal until you see ===START EXECUTION===.
2. This IDE uses an asm.js compilation of WBC, compilation of C code is with ELVM.
3. It is bad to use this on a slow (as the compiler in ELVM is extremely slow) browser.
4. Please wait a moment before you run any code.
5. Compilation starts 2 seconds after clicking the run button (for the asm.js memory initializer to load). But in reality it may be slower (depends on your browser's speed).
6. ELVM's "bytes" are 24 bits, not 8 bits, so better not try programs that require wrapping.
7. Be patient, asm.js's load speed is very slow.