Space to shoot, move mouse pointer to aim. type numbers 1-6 to change between guns. Press p to pause the game and access the shop. Upgrades apply for all guns. However, the 'p' button does not work up to 1 second before the next Boss zombie arrives. When you are at the shop, the Next button brings you to the next page of upgrades. When you are not, you can pay $400 to start battling the next wave of new zombies that are stronger( Have extra health). When you call for a new wave 12 times, you win the game. There are 5 guns, and you press buttons 1-5 to buy them. Guns 1 and 2(Pistol and Machine Gun) are free. Gun 3(Broken Sniper) costs $150 Gun 4(Shotgun)costs $200. It has very slow reloading speed but shoots 20 bullets at a time and originally deals 2 damage. Gun 5(Plasma Gun) costs $500, and it is the most powerful gun, especially with size upgrades. Its bullets are made penetrating. It also deals 6 damage initially. The things with the coloured circle and black lines are zombies. Your mission is to win the game, while zombies go to you and try to make you lose health by touching you. There are three colours: Green: These are the normal zombies. They have 3 hp. They drop $1 when defeated. Orange: these are the strong zombies. They have 6 hp but they move more slowly than normal zombies. They drop $2 when defeated. Yellow: These are the fast zombies. They are the hardest to defeat as they have 3hp but move twice as fast as the normal zombies. Drops $2 when defeated. Big Green: Boss Zombie. It spawns every 30 seconds of 'peace'(Peace defined as no Boss Zombie attacking U). It has 45 hp and can spawn zombies. It's health increases over time and it drops $45
Encouraged to read instructions before playing. This took me about 6 months to make. Hope you enjoy it. V3 is already out: https://scratch.mit.edu/projects/386154153