Focus (Indie game)

Focus is a 2D platformer game with a teleporting mechanic called “Focus
Mode”. You’ll be fighting your way to freedom through a world consisting
of mysterious caves filled with rather unfriendly flying robot enemies.
Inside your “Focus Field” everything will move in slow motion so you
can easily dodge missiles and other things you don’t want to touch. (copied and pasted from the Website)

Link: http://www.venbrux.com/blog/

Video:

most of those games are really quite addicting like pacman and space invaders but some are just a bit boring after a while but another good one is super mario