I have almost 77K on block blast, heres how I did it (for those who cant get over 20k)
Just starting off by saying I dont really care if you have a better score than me. my score took me about an hour and I feel guilty wasting that time lol... i dont have time to grind 3 mil or whatever.
Anyways, I have a couple tips for you if you are struggling to break even 10k because that was me last week.
Combos are important! Always try to build your combo. I feel like people dont realize you actually have to think in this game. Takes me a while to place even the three blocks I get because i neeed to hold my combo or else i lose... Always clear a line on your third block placed! This way you can visually see the blocks uou have and be able to use two of them before making a line.
Think about your placement. It takes me at least 2 minutes to think about where i will put my blocks before placing them when you get above 20K. Dont let it stun you from playing though, its not too bad.
The higher score you get, the higher you can get. you can not just score 100k on one try. At first my best was 6k, then 9k, then 14k, then 22k, then 77k as you can see it gets easier to score higher the more you practice.
Hope this helps