hi if your ever thinking of making a sequel or updating the game then i have a couple of ideas, you can put different power ups across the map that spawn every 40 seconds or something, you can have it so after a bit of power ups you can get a different gun, the power ups can be like shields, speed boost and something that gives you rapid fire for 10 secs. You can also increase the number of jams that spawn as you keep playing so it becomes harder as you go on. different guns can be, a rail gun that you have to charge up to shoot and a gun that has a bullet or something that can bounce of walls. And you can give like limited ammo and you have to collect ammo all across the map. also as you go on in the game you can have jams that run faster and jams that take more bullets to kill and jams that also have guns but there aim is not to good so the game is not to hard. And as soon as a player hits the score of 100 or 1000 then they have a big boss fight with a big big jam and later on they can have a final boss fight with like the king of all jams and he is like massive compared to all the other little jams and he can shoot out multiple jams at you that you have to dodge and he can have a smash move every time you get close to him or something. Also you can have animations when you hit a certain score and for when the boss comes in. Anyway great game hope you take my list of never ending suggestions and put it in your game :)
