You bet there was really no time for some polishing. On Thursday evening I aimed for getting the bits done that were still missing to make it a completely playable game. For example I had no menu and help/instructions screen at all, and no level display and definition for an end point...
With the updated version I added some visual feedback but at the moment it's rather subtle.
I just had an idea on how I might reset it reliably instead of just having it to flash up for a split second and reset automatically that might work better as what I did initially (in my first attempt I had blocks appear as already having been zapped when they went back into play, so I settled with the automated reset...).
Adding mouse input (as had been suggested in the Discord chat) would be something for a post-Jam release 2.0, though...