I’d like to suggest playing Bitmap Brother’s Magic Pockets.
Downsides with this game are it is very difficult to get a DOS copy of this game. As far as I know its still commercial software but not available for purchase as a digital download anywhere online. Physical boxes are also very uncommon.
Upside would be that the game is a fantastic platformer (in my opinion) with great artwork and game content. Music is lacking to say the least, but the sound effects are fairly decent. A very simple game overall to get in to but I think most people would enjoy it.