End of Act 1 of Death of a Salesman

I feel the end of Act 1 conveys a visual imagine of two things happening simultaneous which reveal that Willy may be a 'fake' as he wants to commit suicide, however shows a false sense of happiness, although I feel this could be him simply reminiscing of his old life and saying goodbye to his new life. The end of act 1 leaves suspense as I feel there is tension between Biff and Willy which is unresolved, as they are very similar characters, despite Biff being more outspoken about his true feelings. They both have delusional views of how to be successful and alternating moods towards each other. It could be seen that their relationship is tragic because they cannot help each other.