My game was inspired by Glean (a mining-focused game) and Fossil Fighters (a dinosaur battling game), and I wanted to incorporate as many mechanics from these games as possible.
As my combat system is a 3v3 battle with elemental attrbutes for attacks and dinosaurs, I originally intended to add the option to swap the formation of each dino to allow the player to adapt to whatever formation the AI had adopted. But my code wasn't robust enough for that, and I ended up scrapping the whole, thing, making the combat a bit more shallow and unbalanced than I wanted to.
As for the mining/exploration, the original Glean had a bit more mechanics and mineable tiles implemented to make the experience less one-note, like gas clusters trapped in stone that would explore if you mined it too reckmlessly, and recipes you needed to unlock to progress deeper in the mine. I managed to implement some upgrades, but some items and tiles I wanted to mine would take too long, so I scrapped the idea.
Also, I couldn't make my game very horny. I originally planned to make small pixel art animations of the main girl fucking the dinos, but once I realized how long it would take me just for the default idle animation, I gave up and relegated the sex scenes to simple lines of text.