The annoying bit was mainly the balls surrounding the nucleus, doing any form of long range shot was a bit random and usually the electron would just bounce around and sometimes into it. I also found the controls overly fiddly, once I attained max speed, when facing the other way and accelerating, instead of slowing down to a stop then going again I'd just flip around to max speed in that direction, so getting some electrons when you're close to them is a bit of a pain.
It's boring because from what I played all the levels were the same, seeing the huge list of elements and the top ones being +100 electrons to collect didn't seem very appealing to me, maybe some of the levels could be different(or maybe they are?), i.e. if I'm on the uranium level then maybe I get radiation damage from getting too close to the nucleus, or if I'm on a level with some type of liquid then maybe there could be liquid obstacles around the map, if I go into them then my movement is slowed down for a while or something, so having each level give you information about each specific element might add some variation. Maybe even instead of just a time limit, once it expires the element goes through various chemical states, so it starts off as a solid, when it melts into a liquid, and if you really suck it turns into a gas and maybe spawns moving gas clouds around the level, who knows. Also, if you add this variation thing it it might be nice if you could move around to a level that's around you, rather than just going to the next one in a fixed order, i.e. if I complete the Nickel level I could jump to Lead, but if you make each level different then it's not so much a linear sequence of jumping to a much harder/longer level, but a far different one, so if a certain stage is too hard then players could move to another and try it later, currently if they can't do the current level then they won't be able to do the next or the ones after as they are the same, just harder.
