hey check out the demo of my 2D action platformer game "Citadel Stormer 2".
Page: https://pixeltroid.itch.io/citadel-stormer-2
It includes the first level and will give you at least 30 minutes of play, that is, assuming you don't beat it without losing any lives. If you enjoyed it, I'll tag you when I release my next demo which will be longer and contain more levels. :D