This is quite a nice puzzle platformer. The art looks good and the audio suits the game well.
One tip when building for Web: Don't use the Escape key as the only way to get out of a menu.
It is now impossible to play a game fullscreen because you open the settings menu, set the game to fullscreen, the game goes fullscreen and the only way out of the menu is the Escape key, which closes the fullscreen again :P
Great job on the game !