It's a good idea! I think it would have been better to select tools with the number keys, and also the game was running at 15 fps for me, not sure if it was chrome or webgl, fun game nonetheless!
we thought it was part of the fun/stress having to physically change the tools all the time. Too bad about the performance, maybe it a hardware acceleration thing, we never encountered any performance issues and some have even tried on a phone.
