Thank you for response, I hope you enjoyed the game.
About slot machine was a part of bigger mechanic (which I didn’t implement due to lack of time) and it’s goal was to get powerups (yes, the game also was planned to have them), but I only added a posibility to gain one health/heart when you choose all three (the same) symbols. If you didn’t noticed earlier, you can pull by clicking “Left Control”. However, there is a bug which I cannot eliminate with a third slot, so you need to pull it quite close to the center (it has not a cool animation like for two previous slots).