Musical/rythmical/logical game
I would like to try something new this year, so I settled mentally on the topic of music. I like 2D tile-based games (and they are simple to make) and digital audio software such as LMMS, FL Studio etc. and I will try to combine both.
My idea is that a loop will be played at the start of each level (and you can replay it as many times as you wish) and your task is to connect marks placed rather randomly in a grid with a single continuous line (this is a quite common technique on smart phone games) and reproduce the same mellody. When you hit play then, some dude will walk along the line and whenever it crosses some mark, it will play the sound of the mark (e.g. kick-drum, snare, hi-hat, but also can be used for different piano notes).
Here is the idea on the paper:

