Thanks for submitting all the comments, feedback, and bug reports so far...
If you're bug hasn't been fixed yet, don't worry... we're working on it.
We plan to regularly release new alpha builds over the next few months as we work toward beta.
Thanks again so much for all of your help and support.
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Let us know what you think of the new time step controls and handling... it's still a work in progress and doesn't yet work correctly in all simulations, but is a big improvement over Alpha 0 (the first release) and how the original Universe Sandbox handled time.