The initial bouts where Miguel keeps getting beaten down were a little odd - until I noticed that, since it's a percentage loss, he'll never actually run out of money. Just a matter of levelling up. Adding a little story-based warning to the opening dialogue might clarify that, but it's the only real criticism I have - this is a lot of fun. <3
However, the localization doesn't seem to be working on the upgrade screen on the right. Regardless of whether I select English or Spanish, it still lists the upgrade names in Spanish. The rest of it reads just fine in English (tooltips, stat names, story beats, all that) - it's just the upgrade names.