Jazz Jackrabbit

Epic MegaGames' answer to Sonic, 1994, by Cliff Bleszinski and Arjan Brussee: a green hare with a big gun, scrolling faster than a PC was supposed to. This is the shareware episode, Turtle Terror, the whole of it, running in DOSBox compiled to WebAssembly on the files Epic released.

Jazz Jackrabbit

About a megabyte and a half, fetched once and then kept by your browser. Sound and music are on.

It opens on its options screen: pick Done, then Start New Game.

W S A D or the arrows
run, and duck with down
Alt
jump
Space
shoot
Ctrl
change weapon
Esc
the menu
F
fullscreen

Jazz Jackrabbit is Epic MegaGames', copyright 1994. This is the shareware episode as Epic released it, whose license.doc allows and encourages online services to distribute the game as long as no files are altered or removed; every file is in the bundle unchanged, and beside them sit the two its own setup program writes, so it starts without being asked for a sound card. The full game is sold by Epic today. Where every game in the arcade comes from, with its terms, is on the arcade page.