learn-cpp-roblox (Mini-Roblox)

A quick-play, Roblox-style 3D block sandbox + obby written in C++.

Built with zero external dependencies: raw X11 + GLX + OpenGL 2.1 (immediate mode), with all X11/GL/GLX symbols declared directly in the source.

Gameplay (about 2 minutes)

• Spawn on the green pad, run and jump across 8 colored bridges
• Collect gold coins above each bridge
• Reach the golden platform at the end to finish
• Creative mode: build bridges, ramps, or shortcuts with the mouse

Controls

Key / Mouse	Action
W A S D	Move
Space	Jump
Mouse	Look (inverted pitch)
Left click	Place block
Right click	Remove block
1–6	Select block color
R	Reset / replay
Esc	Quit

Build

Requires only a C++ compiler and the system's X11 + OpenGL runtime libraries.

./build.sh      # downloads the Zig toolchain automatically if needed
./mini_roblox   # run

Files

• main.cpp — the entire game (rendering, physics, input, HUD, UI)
• build.sh — build script (auto-downloads a portable Zig compiler)