Overall, it is good progress. Game art design is a cartoon style that is consistant between different sprites, and brings me nostalgia of my early life. The gameplay is pretty good as well. The raise of prices are well balanced with the amount you earn. A few things you should add in the future: Prestige, upgrades, more investments, and if you would like, an item that appears occasionally and gives you a slight 'time warp' for your earnings.
Keep up the good work!