Seems easy at first, but gets hard as the game progress. The increased speed added so much risk to bumping into walls. And you can't really move slow and cautiously as the time is limited each dive. And because the time is limited each dive, you'll want to increase the speed. Really nice synergy between the mechanics to create a challenging situation for the player. Well done on that!
Also I liked that you have to learn the path, feels like you're progressing the game not just in upgrade numbers but also in memory itself.
