The Market (Prototype)

The Market is a stock market game, currently in an early Prototype phase.
I would appreciate anybody who is interested in this type of financial game to try it, and give your honest opinion.

I plan to continue work on this project, though feedback would help motivate me, and help to make the game as good as it can be.

Game History:

I have always had an interest in finance-related and money-making games, and have played my share of them over the years.

Recently, I have been avidly learning how to code and create games using various tools and programs, such as the one I am using for this project, PICO-8.

The idea for The Market came to me when I was trying to find a good Stock Market Simulator game to play, but couldn't find quite was I was looking for. They were either too complicated and confusing, or too simple.
I decided to create one myself.

About PICO-8:

PICO-8 is a Fantasy Console used for making ``tiny`` games.
It runs on a resolution of 128x128 pixels.
If you`d like to learn more about PICO-8, check out this link:
https://www.lexaloffle.com/pico-8.php

Game Details:

At the moment The Market Prototype is very bare-bones. I have the basic infrastructure in place, and it is technically playable, though. There are two product shares available to buy/sell; Cola and Coffee. The prices fluctuate up and down, within a certain margin, and it is your job to decide the best time to buy or sell.

Currently there is no real use for the in-game money, aside from buying stocks. But, I have plans to change that in the future, such as some kind of upgrades you'd spend your money on.

Note:
I only have access to a Windows PC, so the Linux version is untested.
Feedback as to whether it works, or if it works differently, is appreciated.

Game Controls:
Up and Down Arrow Keys - Navigate Shares
Left and Right Arrow Keys - Buy or Sell Shares
Z Key - Save Game
X Key - Load Game

Current Features (v0.2):
-2 Products
-Fluctuating Share Price
-Ability to Save and Load

Potential or Planned Features:
More Products
Upgrades to Purchase
Multiple Game Screens and Menu`s (possibly a graph screen)
More, More, More... (will take suggestions)

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Patch Notes

v0.2a:
-Fixed bug which allowed share stock to be sold when shouldn't have been allowed

v0.2b:
-Fixed bug where trend symbol wouldn't correctly update for coffee shares
-Added current stock of specific shares to left of product.