I am currently working on Lumber Tycoon 3. Some of the changes include buying (randomly generated) equipment (armor/boots/axe) that have perks (Insta-Sell/Double Logs/Speed Increase) to enhance your tycoon money making abilities. Real estate will still be in the upcoming version, however instead of a premade house, there will be a home supplier that sells blocks that you can buy so you can make your own personalized home (almost like a 2D Minecraft). Lastly to get the players more involved there will be a Building with information on how you can submit your own artwork to be used for the equipment if you would like. You would just send the image with a creative word and your item will be added into Lumber Tycoon 3:) Please let me know what you guys think! Thumbs this comment up so others can see, thanks!
Overall its a good start, I think if you added more content such as more upgrades, make the map larger with more resources, and include some animations such as how minecraft lets the user see when they have almost destroyed the block.
I completed the game and got all upgrades in probably around 5 minutes. Once you realize you can just go to the bottom and get the expensive ore it becomes way too easy. Maybe have each drill level allow you to break a new and more expensive ore. Also make sure that the highest upgrade stays with the player, meaning I bought the best oxygen tank before the 2nd one and later when I bought the 2nd one just for the heck of it I think it downgraded me. Anyways good start and good luck:)