This has been patched on the live server but must be fixed here
build.js line 332 // Forces to use no unit instead of percentage if(existingEffect.unit == "%" && stepEffect.getUnit() == "none") { existingEffect.unit = "none"; }
A lot of part could probably be broke into more files and a lot of content (specially the one that handle stats summary) should be moved in the right place. This will be the first priority before doing anything else.
When using Nautsbuilder V2 in a browser window with a width of 2560 pixels or greater at default zoom level, or lower resolutions at a reduced zoom level, the upgrade price and currency symbol for Piggy Bank (and potentially other upgrades with low prices) end up on different lines, causing the following visual bug:
OS: Linux Mint 18 (64-bit)
Browser: Waterfox 56.0.3