Making a simulation game is challenging, congratulate on finishing one!
I love these kind of game. I really liked the graphics, it is nicely drawn and looks clean. However there are some UI layering issue where the panel is behind the button so I couldn't see what was on the panel. See screenshot: Capture.PNG
Now back to the gameplay, it is not as polished as the graphics. However, since I made 2 simulation games before, I know how much work there is to make a game like this. So please don't take these criticism too personally.
* It seems there is no penalty for creating an oil deficit, so I can just jack up the price and produce very little and that way my company just earns money without any drawback * I can see that the fun part of the game is to balance your oil production to control the price and earning. However, without some sort of overview stats (e.g. how much money i'm earning / losing per tick), I can't really tell the effects of each of my actions (I increase my oil production, price drop a little, does my increment help my income or not? I can't tell without resolving to calculator or pen and paper) * I still don't understand the impact of region demand / produce as well as stability. (Seems like it impact the build and research cost but I can't really tell? Also I was earning so much money so I didn't really care :p) * The late game gets a bit tedious since I had so many oil production I need to click through. Would be nice if it automatically lower the production when an oil well is exhausted. * The game lacks a goal. I enjoyed earning money and seeing my company expanding over the globe. However, without a lose condition and a clear win condition, I got bore after a while. A little bit of a goal would help. For example, if you sets a dollar amount as the gold medal, another amount for a silver medal, etc. Then the player will have a challenge to work towards. Right now the game has nothing to work towards.
Hope these feedback helps! I love the theme, the graphics is fantastic. It has a lot of potentials. Well done putting it together within 48 hours. I know it was hard. Good job! You should be proud :)