Update to previous comment: You could also highlight the text and type something in to replace it. It's probably a more convenient solution to the backspace issue...
I've discovered something: If you want to modify something by typing in values (and the backspace doesn't work), try highlighting whatever needs to be deleted then press the 'delete' button on the keyboard.
It was the first time I had ever used the 'delete' button, but it should work for others too. Hopefully it helps Chrome users like me.
There are some people who reported this and it only happens on Chrome with the WebGL-Version. Currently I can't do much but wait until the Unity-Developers will release the next version which hopefully fixes this.
I think I have a decent Tangerine stock technique nailed down: I'm trying to only buy stock once it goes under 30, then keep it until it reaches 80. I have yet to discover any exact minimum/maximum cost possibility.
There should be something in the market (buy/sell things for cash) where you can trade or sell resources for other things, because I have a LOT of steel and a shortage on everything else.
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And why can a penguin fly outside of the atmosphere, reenter, crash and just try again the next day?