I like the idea for this game and it reminds me of a similair mobile game I had once that I found really addictive. I think you need a fullscreen option (unless I missed it somewhere) because its really tiny on a high-res screen and difficult to see what you're doing. As others have said the difficulty was a bit high and quite unforgiving if you make a mistake, but still I played it several times and was proud of high up I managed to go lol. For your first game jam game I think this is awesome so great going. For any game you make going forward just remember to make it very easy to see whats going on, and to ramp up difficulty very slowly at first before you start accelerating it - this way you will keep people playing for longer. Great work and hope to see your submissions again on future game jams!