The first use load is a little slow as the game is copying the dictionary to your phone. Once you get used to forming words from different directions you'll be forming more than 4 letter words in no time.
Some gameplay tips:
1. Make plural words.
2. Destroy obstacle tiles whenever possible by making them fall 2 tiles as they produce the most points.
3. Use shuffle often !
4. If you're stuck in the bonus round, click on the Pass button to skip to the next puzzle fast !
5. Know your 2 letter words such as: AD, AH, AR, AW, BI, ED, EF, EH, EL, EM, EN, ER, ES, EX, FA, HA, HM, HO, LA to name a few.
6. Know your 3 letter words such as: GEE, WEE, TEE.
7. Common word endings to include are: -ING, -ED, -ER, -IER, -IEST, and -IES.
Hope this helps