I really like the concept, but the level design makes this feel like a rage game towards the last two levels. Honestly, I would've probably quit if I didn't want to finish this in order to write a complete review of the game, and so I ended up playing this for about an hour before finally getting to the end, and I have never been as glad as I am right now at seeing a completion screen.
The graphics are really nice, along with the animations, which make up one of the strong points of the game. The gameplay itself is simple and easy to pick up. I liked the ice mechanic, because it provided for interesting backtracking and required some strategic planning.
However, the level design becomes punishing in the later half. For the fourth clocktower, I actually noticed that it was possible to backtrack to hit up a candle (the leftmost one out of the beginning three candles, provided you don't extinguish it early) and go up the stairs completely in water form, which was ok but not very intuitive. The fifth clocktower is where I got the most frustrated, however, because all the long corridors make it so rather than skill, it tests your patience, and coupled with the fact that the water retains slight momentum and therefore requires you to alternate the a and d keys to stop it from going too close to the edges when traveling up tall corridors, it became a long and tedious process. The first and second snowflakes require the player to hit them at the right angle with not much leeway, lest they get stuck (in a pit for the first, and on the wrong side of a two tile high wall for the second), and it felt unnecessary when there was already a difficulty increase from the corridors. The last section of the fifth clocktower is particularly painful, specifically because the player doesn't know which part to go through- the left side, or the right side. If they choose the wrong side, they get to replay the entirety of the level (which took me maybe 5-10 minutes? not sure, I lost count) until they get back to that section and hope they can figure out how to solve that section then and there. These issues could definitely be avoided by getting feedback from playtesters before release. Also, small note- there's a slight graphical error at the beginning of the fifth clocktower, and it looks like some tiles were misplaced (I can provide a screenshot if you want).
Regardless, I agree with the first reviewer that more people should play this game. The first three clocktowers are pretty fun, and there's a lot of potential for new mechanics. If you did a sequel or an expanded version, I'd probably check it out.