Kill 'Em

Wolfenstein 3D, released a quarter century ago, had an option for strafing. If you really want to ignore a couple decades of development, and release an FPS without mouselook, at least add in strafe controls. Apart from that, maybe a run button... But, honestly, strafing should be your #1 priority right now; this kind of game, with just basic tank controls (especially with such a slow turn rate) is paaainful.

OK, fullscreen helps (although the game runs noticeably slower in fullscreen for me), although you can't turn once the cursor hits the screen edge.

One way a lot of games handle this is, after checking for how far the mouse has travelled (and so how far to move the camera), move the mouse cursor to the centre of the screen. That way, the cursor always stays far within the bounds of the window, and people can spin round in the same direction all day long if they want to.

OK, thanks for the update! Mouselook and strafing make the controls night and day, feels way better to play... except, the mouse cursor isn't constrained to the window. Turning more than about a quarter turn pushes the mouse cursor out of the window and control is lost. Trying to turn significantly means swiping the cursor across the window repeatedly, then looping it above/below the game window to re-enter from the other side. Fix this, and you have a solid framework to continue building your game.

I wanted to enjoy, but either it is Chrome, my computer, or something else, but I could not complete the training level. It loaded SLOW, the gun would take seconds between clicking to fire and it firing.

I was very excited to see an "old school" shooter, but this is not it.