A well balanced incremental (no huge timewalls, no speeding through without even having time to read the upgrades names), however the lack of any strategy or thinking made it unfun for me. Just buying whatever upgrade is available first as soon as you can is not exactly thrilling gameplay. It's also not very original.
I did like the particle physics theme, I think the game could have capitalized on that further by adding some information snippets related to the development of the universe whenever you unlock something new.
I guess the jam theme was "time"? I don't see it written anywhere. :( Okay fit I guess, but you don't really interact with time in a meaningful manner, so could have done more there.