Awesome game to have made by yourself. Really liked the use of risk both by having to return to the portal after going to hell in 5 minutes or risk being closed off forever and by giving the player the ability to close the portal for a massive boost. That's at least how I could beat the game. One criticism I have is with the balance of acquiring gold. It's too slow. It would either be best to have the enemies drop more gold or for the prices to be dropped to make it more affordable. Otherwise people will just choose to speedrun the (impressively) massive map and not use too much of the combat to win.
Other than that, congrats on your game!