It turned out that the texture of the damaged block wasn’t rendering in the embroidery-style theme. As a result, after destroying a block, it could look like you were running into an invisible block.
We’ve fixed the bug. Everything now renders correctly.
As a reminder, you can shoot a Special Bullet, which destroys blocks in a single shot but doesn’t damage enemies, and a Combat Bullet, which destroys enemies but takes two shots to break blocks. Use these bullets tactically.
And if you’re enjoying the game, please consider leaving a review on Steam - it really helps us become more visible to other players.