graphics are bad, big numbers are a bit confusing, I pushed "start 2 times and got 2 different tabs, firts time it was submarine & other things, second time it was the "normal" tab with upgrades. screen is too small, maybe you could use a bigger interface, means more readable text & no need to zoom in. Upgrade tab semms bugged : up & down arrows are moving things horizontally... and so on !I give 2 stars : 1 for playability, 1 for frequent updates.
nice start ! keep update it and it will get more & more stars. 3 stars atm, waiting for more...
skills makes shop sells faster. orange bar is the duration of the skill, the money is the price.
about MULTIBUY : click on the thing you want to buy, then press down "enter", it will buy it until you release the enter key.. or when you re in lack of money
I think I found the error, will try to get a hotfix ready asap.