I remember seeing some of your progress pictures on this in the Discord. It turned out well!
The controls are nice, the graphics have nice touches and the inclusion of pick-ups to gain health or wipe out all the current enemies are a nice addition. The gamepad support is also appreciated!
One issue is that it's difficult to turn and shoot at a nearby skeleton without accidentally walking into their attack. Some games get around this by having a button which, when held, allows the player to aim in any direction without moving.
Other than that, all you'd need is enemy variety and some more power-ups to have a full fledged game. :)