Yeah, I planned on having a small tutorial for the first level or two.  Ideally with a cut scene showing the merge.  There are a ton of gameplay tweaks and juice I was hoping to add.  The level system currently is supposed to work increase every minute OR twenty seconds of play with no merges(It broke a bit at some point). Every time the level increases the spawn rate increases for the first 5 levels, and then the hitpoints increase by 50% for the last 5 levels.  I intended it to be self-regulating for difficulty, since the better you are the faster it increases.  I agree that the feedback for the player is lacking there.  I had pretty limited time during the week. I did learn a ton though, and I'm pretty sure I will be able to get more done in half the time next jam.  Thanks for the feedback!