A very minimal javascript platform game Play Tiny Platformer instantly on arcadefork - no download, no sign-up, works on any device.
Originally by jakesgordon · undefined licence · source
Yes. Tiny Platformer runs entirely in your browser on arcadefork - no download, no account, no payment.
Tiny Platformer is an open-source project by jakesgordon, published under the MIT licence. The original source is linked from the credits page.
It is served as a normal web page, so it scales to your screen. If it needs a keyboard, the on-screen controls are still there.