Update readme.md

readme.md

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 # SDLchip
 
 A simple cross-platform [chip8](https://en.wikipedia.org/wiki/CHIP-8) implementation written in c using the [SDL2](https://www.libsdl.org/) graphics library. 
-* now with emscripten support (desktop only) [demo pwa](jarekt.github.io/sdlchip/index.html)
+* now with emscripten support (desktop only) [demo pwa](https://jarekt.github.io/SDLchip/index.html)
 
 ## Precompiled executables
 * check the releases tab
@@ -33,4 +33,4 @@ O - reset loaded cartridge
 * a python script for converting files to c strings (so they can be compiled as part of the binary) - used for the Tetris demo
 
 ## Pictures
-* ![running on linux](img/demo.png)
+* ![running on linux](img/demo.png)