Hardest part about level design in Tile Tapper for me is I can't expect the players to have good audio equipment. So when I map something to an instrument in the game - it's something good headphones may here but someone without that might not hear it.
Either way, I just finished a huge milestone yesterday in Tile Tapper's development - I'm expecting the game to be released soon. More details soon, stay tuned!
Oh, and as a quick little aside - I have plans for what the first post-release update will contain. The only thing I can confirm is a new gameplay mechanic and a new >2min level to show it off at its best! There is progress on this update already in the pipeline.
See you soon!