I would definitely recommend the developers to check out other games of the same genre and figure out what really needs to be fixed before expecting people to actually continue playing this game other than for the current achievements. Also, please listen to the commenters' suggestions and take them in consideration.
It would be better if the enemies were more random or if there was a checkpoint. Having to start from the beginning killing the same pattern over and over gets a bit too repetitive.
If the current chat room is too crowded to complete patterns, click on the setting button on top right side of the chat window and choose 'Change chat rooms'. There are 7 rooms in total. I'd recommend you to stay in room #1 until you get all the levels before moving out though.
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