Thanks for the feedback!!
Yeah you're right, it was really hard to balance the experience as I wanted a starting point not too overwhelming for new players, but still interesting and intense for more experienced ones... Which is why new blocs appear only if you destroy some, during the first 15 waves.
But now that I've gathered more feedback I agree that it is still overwhelming for new players. It gave me some ideas to improve the experience, so look forward to that haha ;)