This is pretty good. I think you should lower the amount of enemies at the beginning because at the moment it's very easy to die before I even get my 1st upgrade. There is also a bug where sometimes I couldn't move. Well done!
Thanks for playing yeah I didn't get a lo of play testing in just ran out of time, I have adjusted it up. But yes you really have to hustle to get first energy charge. I made it easier after that just so people can have fun with power-ups. Thanks for the bug update i have found that too.