Madness Penalty Chamber is a simulation game that lets you carry out an execution on some dude you have captured. You do not need a story, all you know is this dude needs to learn his lesson. You have a huge array of weapons available at your disposal, and you have to choose one of them to let this guy (or whatever remains of him) know who is the boss.
Madness Penalty Chamber was made by Gabriel Barsch.
Click/tap the weapon you'd like to use. There's an arrow at the bottom right that you can choose for some more weapon goodness (some of them are combined weapons)