Use the Left and Right arrow keys to move, and the Down arrow to pick up or drop a block. Click the game first so it captures your keystrokes. Best played on a desktop or laptop.
Block Dude is a tile-based logic puzzle that became a cult classic on Texas Instruments TI-83 and TI-84 graphing calculators, where a generation of students discreetly played it during math class. You control a little character who can walk left and right but can only step up a single tile at a time. To reach the door that ends each room, you must pick up wooden crates, carry them across the level, and stack them into stairways that let you climb over walls and bridge gaps. The challenge is purely spatial: there are no enemies and no timer, just the satisfying puzzle of figuring out the right order to move and place each block. This browser version is part of Steven Lambert's Basic HTML Games series and is released into the public domain under CC0, which is what lets PlayBrain self-host the original open-source build for you to play here.
Credits: Block Dude by Steven Lambert (straker), released into the public domain (CC0 1.0) as part of the Basic HTML Games series. Source: gist.github.com/straker