Glad you liked it, I only had less than 20 hours to actually do the work, so it was a challenge indeed.
Clamping the speed was my initial plan. Due to the lack of time, I ended up just using the Time.timeScale++ to make the game speed up. In hindsight I would have just increased the drop interval. So because of that choice, clamping was out (mostly because I was outta time). I figured people would use the down arrow to just slow them down as needed; however, the ratio of speed over time gets really big.
Also, given more time I would have totally expanded the game. On the trello board included bombs, blocks (blockers that had timers), a power up to freeze time (drops) and one to change laser color with the spacebar, and of course.... more colors.
So many ideas, so little time.
Thanks again for the feedback, I totally agree with you.