I took a screenshot but my friend had his phone and he deleted it! I was so focused on the game that I forgot to tell my friend so that it wouldn't get ruined.
One of the great things about playing this game is that its 2D graphics design is really cool. I like it because the design looks very elegant and I was able to get through levels 1 and 2 easily. I thought the game was pretty easy but with the boss, it (level 3) seemed difficult to me but I managed to get through it. I'm at my best to beat the boss and possibly level 4.
My idea is to focus on one prick first, break it into pieces and be able to destroy it one by one. This way you won't have too many pricks to destroy and avoid. One of the things I like most about it is that it makes it easier for you to avoid the pricks.
Level 3 seemed hard to me and level 4 gets harder because there are two big pricks already in line. It's hard because there's a time when you can't avoid the other pricks. So something breaks, which causes more holes in the number.
The strategy will always be the same, focus on one hole at a time and destroy it. Make sure you don't destroy the other holes because it will increase in number. So hitting it repeatedly will destroy it.