For 4-5 hours this was decent. But I believe you could have done more. Missed some audio there and maybe a bit of background music. Graphics could have been better... well, it's a prototype. And you surely could add more ideas to that game.... maybe make the numbers floating around or moving to create different levels to master... and set goals like a minimum number of connections to achieve in each level. Hope to see you in one of the next Game Jams!