Bitty_Engine_core_v1.1.6_win_macos_linux_x86_64_Universal.zip
This pre-built package already contains a startup project at "bitty.app/Contents/data", remove it to start the editor.
Bitty_Engine_runtime_v1.1.6_win_x86_64_GLSL.zip
This pre-built package contains binary for Windows 64bit with GLSL enabled, and it supports obfuscated project. You can replace the built executable with it.