I tried with 3 different browsers and I am unable to place or break stuff, the progress bar appears and nothing is happening...
Hmm, i did not have those problems. And i used firefox to try out the game. So it's probably a problem on your end and not actually the game. And make sure you're holding right click when breaking trees or stone. I did the same mistake thinking the hoe was the "tool to hold" when breaking stuff, and by instinct use left click (damn you minecraft and terraria!!!).