Between yesterday and today, I made progress on several things. The main advancements were the stage selection and having the match occur in the chosen stage.
On the other hand, I implemented a basic sprite drawing system (1-frame animations). With this, the game reached a new level, and I find the sprite changes and how the encounters unfold very amusing. It now feels like it has a soul and personality.
I still have several fundamental things to complete, such as audio, finishing the frames for several characters, and adding a micro “combo” system that would just be flavor text to give the game more richness and HYPE. :D