Thanks for playing and sharing some feedback! The player ice cubes despawning on death was quite an intentional design choice (for a few reasons), but we know it's not for everyone. We're going to be developing it more post-jam, so we'll definitely add a 'chilled mode' which adds that option for players who want to focus more on the puzzles
Definitely hear you about the UI / blind jumps too. A basic UI for the block count and a more dynamic camera were on the list, but we prioritised getting the core mechanics solid and working well for the submission deadline. Glad you enjoyed it!