WASD: Moving Space: Attack E: Open and close shop Gameplay: Each room could either be a boss room, or a regular room. The regular room has 1-3 red enemies, the boss room has one big green enemy. After beating all of the enemies, the doors (on the sides) open and you can walk through, but if you go back the way you came, the room will be different. Enemies: The red enemy has 3 hitpoints, and you get 5 coins when you defeat it. Every now and then, the red enemy will charge at you, until it gets tired. The boss enemy has 10 hitpoints, and you get +1 health, 15 coins, and one score when you defeat it. the boss enemy is constantly charging at you, but it moves slower. When you defeat the last enemy you get 5 extra coins (usually). Shop: You can spend the coins you get in the shop. The first item (An Aid Kit) has 5 in stock, and costs 20 coins. When you buy it, you get +2 Health. The second item (An Advanced Aid Kit) has 5 in stock, and costs 35 coins. When you buy it, you get +1 Health, and +1-2 Max Health. The third item (A Sharpened Sword) has 1 in stock, and costs 55 coins. When you buy it, your attacks permanently (until you get defeated) have a chance to deal 2 damage instead of 1. Once you run out of Health, your coins get converted into score.
This game still has plenty glitches and i'm sorry if I forgot to mention something.