Thanks for playing and for the feedback! As far as controlling where the block goes I tried to provide an indicator with the next block to show where it would fall relative to your dinosaur, but I guess that was not very clear.
The speed does increase along with your score and maxes out when you get to 4000 points at which point the speed is so fast it gets really hard to platform around successfully.
Working around not being able to turn the blocks made it interesting because that was such a crucial control component in original tetris. The sand blocks were introduced to help solve that, but I feel like the solution was only a partial solution. Through a bunch of playtesting I found that Easy mode (which only had 1x1, 1x2, 1x3, 1x4 and 2x2 blocks) it was very achievable to get to the max speed and survive at that speed for a time, but it required playing a little bit differently than you would in straight up tetris since you are planing what your terrain would be rather than just trying to clear the rows. Hard mode which has all of the other tetris block types did prove to be very difficult due to the lack of control (hence why I broke it into a separate mode for those who wanted the challenge)
We had plans to add bomb blocks as well as a few other types, but sadly ran into time constraints and had to scrap those ideas.
Thanks for the feedback as it really shows that the game was not communicating some of its features very well, and there were also areas to improve upon.