Course you can :).
Great! Feel free to use the #UndergroundGame tag, and join the discussion about Underground Gaming!
Just gave your game a quick shot; can't make much out of it as it is affected from a bug connected to my graphics card driver leading to non-functional fonts - so I can't give you a good feedback. Does it use some rock/paper/scissor-like system? Hope that others can give you more elaborate feedback.
Awesome, thanks! I added the tag and if you are still interested, maybe this newgrounds link will be playable for you? https://www.newgrounds.com/portal/view/823850